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* edac,rcu: use synchronize_rcu() instead of call_rcu()+rcu_barrier()Lai Jiangshan2011-05-261-10/+6
| | | | | | | | | | | synchronize_rcu() does the stuff as needed. Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com> Cc: Doug Thompson <dougthompson@xmission.com> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Cc: Mauro Carvalho Chehab <mchehab@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Fix common misspellingsLucas De Marchi2011-03-311-1/+1
| | | | | | Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
* amd64_edac: Rework printk macrosBorislav Petkov2011-01-071-2/+2
| | | | | | | Add a macro per printk level, shorten up error messages. Add relevant information to KERN_INFO level. No functional change. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
* EDAC: Fix workqueue-related crashesBorislav Petkov2010-12-081-4/+6
| | | | | | | | | | | | | | | | | 00740c58541b6087d78418cebca1fcb86dc6077d changed edac_core to un-/register a workqueue item only if a lowlevel driver supplies a polling routine. Normally, when we remove a polling low-level driver, we go and cancel all the queued work. However, the workqueue unreg happens based on the ->op_state setting, and edac_mc_del_mc() sets this to OP_OFFLINE _before_ we cancel the work item, leading to NULL ptr oops on the workqueue list. Fix it by putting the unreg stuff in proper order. Cc: <stable@kernel.org> #36.x Reported-and-tested-by: Tobias Karnat <tobias.karnat@googlemail.com> LKML-Reference: <1291201307.3029.21.camel@Tobias-Karnat> Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
* i7core_edac: don't use a freed mci structMauro Carvalho Chehab2010-10-241-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | This is a nasty bug. Since kobject count will be reduced by zero by edac_mc_del_mc(), and this triggers the kobj release method, the mci memory will be freed automatically. So, all we have left is ctl_name, as shown by enabling debug: [ 80.822186] EDAC DEBUG: in drivers/edac/edac_mc_sysfs.c, line at 1020: edac_remove_sysfs_mci_device() remove_link [ 80.832590] EDAC DEBUG: in drivers/edac/edac_mc_sysfs.c, line at 1024: edac_remove_sysfs_mci_device() remove_mci_instance [ 80.843776] EDAC DEBUG: in drivers/edac/edac_mc_sysfs.c, line at 640: edac_mci_control_release() mci instance idx=0 releasing [ 80.855163] EDAC MC: Removed device 0 for i7core_edac.c i7 core #0: DEV 0000:3f:03.0 [ 80.862936] EDAC DEBUG: in drivers/edac/i7core_edac.c, line at 2089: (null): free structs [ 80.871134] EDAC DEBUG: in drivers/edac/edac_mc.c, line at 238: edac_mc_free() [ 80.878379] EDAC DEBUG: in drivers/edac/edac_mc_sysfs.c, line at 726: edac_mc_unregister_sysfs_main_kobj() [ 80.888043] EDAC DEBUG: in drivers/edac/i7core_edac.c, line at 1232: drivers/edac/i7core_edac.c: i7core_put_devices() Also, kfree(mci) shouldn't happen at the kobj.release, as it happens when edac_remove_sysfs_mci_device() is called, but the logic is: edac_remove_sysfs_mci_device(mci); edac_printk(KERN_INFO, EDAC_MC, "Removed device %d for %s %s: DEV %s\n", mci->mc_idx, mci->mod_name, mci->ctl_name, edac_dev_name(mci)); So, as the edac_printk() needs the mci struct, this generates an OOPS. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* edac_core: Print debug messages at release callsMauro Carvalho Chehab2010-10-241-0/+2
| | | | | | This is important to track a nasty bug at the free logic. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* edac_core: Do a better job with node removalMauro Carvalho Chehab2010-10-241-0/+1
| | | | | | Make sure we remove groups at the right order Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* i7core_edac: Be sure that the edac pci handler will be properly releasedMauro Carvalho Chehab2010-10-241-2/+4
| | | | | | | With multi-sockets, more than one edac pci handler is enabled. Be sure to un-register all instances. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* amd64_edac: Fix driver module removalBorislav Petkov2010-09-271-0/+3
| | | | | | | | | | | | | | f4347553b30ec66530bfe63c84530afea3803396 removed the edac polling mechanism in favor of using a notifier chain for conveying MCE information to edac. However, the module removal path didn't test whether the driver had setup the polling function workqueue at all and the rmmod process was hanging in the kernel at try_to_del_timer_sync() in the cancel_delayed_work() path, trying to cancel an uninitialized work struct. Fix that by adding a balancing check to the workqueue removal path. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
* edac: add memory types strings for debuggingBorislav Petkov2009-12-071-0/+24
| | | | | | | | | | Instead of using deeply-nested conditionals for dumping the DIMM type in debug mode, add a strings array of the supported DIMM types. This is useful in cases where an edac driver supports multiple DRAM types and is only defined in debug builds. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
* edac: core: remove completion-wait for complete with rcu_barrierJesper Dangaard Brouer2009-09-241-3/+1
| | | | | | | | | | | | | | | | | | | Module edac_core.ko uses call_rcu() callbacks in edac_device.c, edac_mc.c and edac_pci.c. They all use a wait_for_completion() scheme, but this scheme it not 100% safe on multiple CPUs. See the _rcu_barrier() implementation which explains why extra precausion is needed. The patch adds a comment about rcu_barrier() and as a precausion calls rcu_barrier(). A maintainer needs to look at removing the wait_for_completion code. [dougthompson@xmission.com: remove the wait_for_completion code] Signed-off-by Jesper Dangaard Brouer <hawk@comx.dk> Signed-off-by: Doug Thompson <dougthompson@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* edac: use to_delayed_work()Jean Delvare2009-04-131-1/+1
| | | | | | | | | | | | | | | The edac-core driver includes code which assumes that the work_struct which is included in every delayed_work is the first member of that structure. This is currently the case but might change in the future, so use to_delayed_work() instead, which doesn't make such an assumption. linux-2.6.30-rc1 has the to_delayed_work() function that will allow this patch to work Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Doug Thompson <dougthompson@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* edac: struct device: replace bus_id with dev_name(), dev_set_name()Kay Sievers2009-01-061-1/+1
| | | | | | | | | | | | | | This patch is part of a larger patch series which will remove the "char bus_id[20]" name string from struct device. The device name is managed in the kobject anyway, and without any size limitation, and just needlessly copied into "struct device". [akpm@linux-foundation.org: coding-style fixes] Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Acked-by: Doug Thompson <dougthompson@xmission.com> Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* dev_name introduction fall out fixStephen Rothwell2008-05-051-3/+3
| | | | | | | | | | | | | | | Commit 06916639e2fed9ee475efef2747a1b7429f8fe76 ("driver-core: add dev_name() to help transition away from using bus_id") added a static inline dev_name() and used it in dev_printk. Unfortunately, drivers/edac/edac_core.h defines a macro called dev_name(). Rename the latter. Diagnosis by Tony Breeds and Michael Ellerman. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Acked-by: Doug Thompson <dougthompson@xmission.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* edac: remove unneeded functions and add static accessorAdrian Bunk2008-04-291-21/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Collection of patches, merged into one, from Adrian that do the following: 1) This patch makes the following needlessly global functions static: - edac_pci_get_log_pe() - edac_pci_get_log_npe() - edac_pci_get_panic_on_pe() - edac_pci_unregister_sysfs_instance_kobj() - edac_pci_main_kobj_setup() 2) Remove unneeded function edac_device_find() 3) Added #if 0 around function edac_pci_find() 4) make the needlessly global edac_pci_generic_check() static 5) Removed function edac_check_mc_devices() Doug Thompson modified Adrian's patches, to bettern represent the direction of EDAC, and make them one patch. Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Doug Thompson <dougthompson@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* edac: use the shorter LIST_HEAD for brevityRobert P. J. Day2008-04-291-1/+1
| | | | | | | Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca> Acked-by: Doug Thompson <norsk5@yahoo.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/edac: fix reset edac_mc pollmsecDoug Thompson2007-07-261-22/+42
| | | | | | | | | | | | | | | | | This fixes a deadlock that could occur on a 'setup' and 'teardown' sequence of the workq for a edac_mc control structure instance. A similiar fix was previously implemented for the edac_device code. In addition, the edac_mc device code there was missing code to allow the workq period valu to be altered via sysfs control. This patch adds that fix on the code, and allows for the changing of the period value as well. Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Doug Thompson <dougthompson@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/edac: fix workq reset deadlockDoug Thompson2007-07-191-19/+53
| | | | | | | | | | | | | | | | | | | Fix mutex locking deadlock on the device controller linked list. Was calling a lock then a function that could call the same lock. Moved the cancel workq function to outside the lock Added some short circuit logic in the workq code Added comments of description Code tidying Signed-off-by: Doug Thompson <dougthompson@xmission.com> Cc: Greg KH <greg@kroah.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Oleg Nesterov <oleg@tv-sign.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/edac: fix edac_mc sysfs completion codeDoug Thompson2007-07-191-15/+21
| | | | | | | | | | | | | | | | | This patch refactors the 'releasing' of kobjects for the edac_mc type of device. The correct pattern of kobject release is followed. As internal kobjs are allocated they bump a ref count on the top level kobj. It in turn has a module ref count on the edac_core module. When internal kobjects are released, they dec the ref count on the top level kobj. When the top level kobj reaches zero, it decrements the ref count on the edac_core object, allow it to be unloaded, as all resources have all now been released. Cc: Alan Cox alan@lxorguk.ukuu.org.uk Signed-off-by: Doug Thompson <dougthompson@xmission.com> Acked-by: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/edac: fix edac_mc init apisDoug Thompson2007-07-191-4/+5
| | | | | | | | | | | | | | | | Refactoring of sysfs code necessitated the refactoring of the edac_mc_alloc() and edac_mc_add_mc() apis, of moving the index value to the alloc() function. This patch alters the in tree drivers to utilize this new api signature. Having the index value performed later created a chicken-and-the-egg issue. Moving it to the alloc() function allows for creating the necessary sysfs entries with the proper index number Cc: Alan Cox alan@lxorguk.ukuu.org.uk Signed-off-by: Doug Thompson <dougthompson@xmission.com> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/edac: mod edac_align_ptr functionDouglas Thompson2007-07-191-5/+4
| | | | | | | | | | Refactor the edac_align_ptr() function to reduce the noise of casting the aligned pointer to the various types of data objects and modified its callers to its new signature Signed-off-by: Douglas Thompson <dougthompson@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/edac: cleanup spaces-gotos after Lindent messupDouglas Thompson2007-07-191-72/+72
| | | | | | | | | | | This patch fixes some remnant spaces inserted by the use of Lindent. Seems Lindent adds some spaces when it shoulded. These have been fixed. In addition, goto targets have issues, these have been fixed in this patch. Signed-off-by: Douglas Thompson <dougthompson@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/edac: cleanup workq ifdefsDouglas Thompson2007-07-191-10/+0
| | | | | | | | | | | | The origin of this code comes from patches at sourceforge, that allow EDAC to be updated to various kernels. With kernel version 2.6.20 a new workq system was installed, thus the patches needed to be modified based on the kernel version. For submitting to the latest kernel.org those #ifdefs are removed Signed-off-by: Douglas Thompson <dougthompson@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/edac: core Lindent cleanupDouglas Thompson2007-07-191-99/+103
| | | | | | | | | Run the EDAC CORE files through Lindent for cleanup Signed-off-by: Douglas Thompson <dougthompson@xmission.com> Signed-off-by: Dave Jiang <djiang@mvista.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/edac: mod PCI poll namesDave Jiang2007-07-191-10/+11
| | | | | | | | | | Fixup poll values for MC and PCI. Also make mc function names unique to mc. Signed-off-by: Dave Jiang <djiang@mvista.com> Signed-off-by: Douglas Thompson <dougthompson@xmissin.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/edac: mod assert_error checkDave Jiang2007-07-191-7/+4
| | | | | | | | | Change error check and clear variable from an atomic to an int Signed-off-by: Dave Jiang <djiang@mvista.com> Signed-off-by: Douglas Thompson <dougthompson@xmission.com Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/edac: mod MC to use workq instead of kthreadDave Jiang2007-07-191-0/+119
| | | | | | | | | | Move the memory controller object to work queue based implementation from the kernel thread based. Signed-off-by: Dave Jiang <djiang@mvista.com> Signed-off-by: Douglas Thompson <dougthompson@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/edac: add dev_name getter functionDave Jiang2007-07-191-3/+3
| | | | | | | | | | | | | | | Move dev_name() macro to a more generic interface since it's not possible to determine whether a device is pci, platform, or of_device easily. Now each low level driver sets the name into the control structure, and the EDAC core references the control structure for the information. Better abstraction. Signed-off-by: Dave Jiang <djiang@mvista.com> Signed-off-by: Douglas Thompson <dougthompson@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/edac: mod use edac_core.hDouglas Thompson2007-07-191-1/+1
| | | | | | | | | | | In the refactoring of edac_mc.c into several subsystem files, the header file edac_mc.h became meaningless. A new header file edac_core.h was created. All the files that previously included "edac_mc.h" are changed to include "edac_core.h". Signed-off-by: Douglas Thompson <dougthompson@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/edac: add new nmi rescanDave Jiang2007-07-191-0/+3
| | | | | | | | | | | | | | | | | | | Provides a way for NMI reported errors on x86 to notify the EDAC subsystem pending ECC errors by writing to a software state variable. Here's the reworked patch. I added an EDAC stub to the kernel so we can have variables that are in the kernel even if EDAC is a module. I also implemented the idea of using the chip driver to select error detection mode via module parameter and eliminate the kernel compile option. Please review/test. Thx! Also, I only made changes to some of the chipset drivers since I am unfamiliar with the other ones. We can add similar changes as we go. Signed-off-by: Dave Jiang <djiang@mvista.com> Signed-off-by: Douglas Thompson <dougthompson@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/edac: change from semaphore to mutex operationMatthias Kaehlcke2007-07-191-9/+9
| | | | | | | | | | | | | The EDAC core code uses a semaphore as mutex. use the mutex API instead of the (binary) semaphore. Matthaias wrote this, but since I had some patches ahead of it, I need to modify it to follow my patches. Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@gmail.com> Signed-off-by: Douglas Thompson <dougthompson@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/edac: add edac_device classDouglas Thompson2007-07-191-4/+4
| | | | | | | | | | | | | | | | | | | | | | | This patch adds the new 'class' of object to be managed, named: 'edac_device'. As a peer of the 'edac_mc' class of object, it provides a non-memory centric view of an ERROR DETECTING device in hardware. It provides a sysfs interface and an abstraction for varioius EDAC type devices. Multiple 'instances' within the class are possible, with each 'instance' able to have multiple 'blocks', and each 'block' having 'attributes'. At the 'block' level there are the 'ce_count' and 'ue_count' fields which the device driver can update and/or call edac_device_handle_XX() functions. At each higher level are additional 'total' count fields, which are a summation of counts below that level. This 'edac_device' has been used to capture and present ECC errors which are found in a a L1 and L2 system on a per CORE/CPU basis. Signed-off-by: Douglas Thompson <dougthompson@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/edac: split out functions to unique filesDouglas Thompson2007-07-191-1306/+11
| | | | | | | | | | | | | | | | | | | | | | | | | This is a large patch to refactor the original EDAC module in the kernel and to break it up into better file granularity, such that each source file contains a given subsystem of the EDAC CORE. Originally, the EDAC 'core' was contained in one source file: edac_mc.c with it corresponding edac_mc.h file. Now, there are the following files: edac_module.c The main module init/exit function and other overhead edac_mc.c Code handling the edac_mc class of object edac_mc_sysfs.c Code handling for sysfs presentation edac_pci_sysfs.c Code handling for PCI sysfs presentation edac_core.h CORE .h include file for 'edac_mc' and 'edac_device' drivers edac_module.h Internal CORE .h include file This forms a foundation upon which a later patch can create the 'edac_device' class of object code in a new file 'edac_device.c'. Signed-off-by: Douglas Thompson <dougthompson@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/edac: core: make functions staticAdrian Bunk2007-07-191-14/+11
| | | | | | | | | This patch makes needlessly global code static, in the edac core Signed-off-by: Adrian Bunk <bunk@stusta.de> Cc: Doug Thompson <norsk5@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/edac: add edac_mc_find APIDouglas Thompson2007-07-191-0/+28
| | | | | | | | | | | | This simple patch adds an important CORE API for EDAC that EDAC drivers can use to find their edac_mc control structure by passing a mem_ctl_info 'instance' value Needed for subsequent patches Signed-off-by: Douglas Thompson <dougthompson@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Freezer: make kernel threads nonfreezable by defaultRafael J. Wysocki2007-07-171-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, the freezer treats all tasks as freezable, except for the kernel threads that explicitly set the PF_NOFREEZE flag for themselves. This approach is problematic, since it requires every kernel thread to either set PF_NOFREEZE explicitly, or call try_to_freeze(), even if it doesn't care for the freezing of tasks at all. It seems better to only require the kernel threads that want to or need to be frozen to use some freezer-related code and to remove any freezer-related code from the other (nonfreezable) kernel threads, which is done in this patch. The patch causes all kernel threads to be nonfreezable by default (ie. to have PF_NOFREEZE set by default) and introduces the set_freezable() function that should be called by the freezable kernel threads in order to unset PF_NOFREEZE. It also makes all of the currently freezable kernel threads call set_freezable(), so it shouldn't cause any (intentional) change of behaviour to appear. Additionally, it updates documentation to describe the freezing of tasks more accurately. [akpm@linux-foundation.org: build fixes] Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Nigel Cunningham <nigel@nigel.suspend2.net> Cc: Pavel Machek <pavel@ucw.cz> Cc: Oleg Nesterov <oleg@tv-sign.ru> Cc: Gautham R Shenoy <ego@in.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [PATCH] EDAC: Add Fully-Buffered DIMM APIs to coreeric wollesen2007-02-121-5/+115
| | | | | | | | | | | | | | Eric Wollesen ported the Bluesmoke Memory Controller driver for the Intel 5000X/V/P (Blackford/Greencreek) chipset to the in kernel EDAC model. This patch incorporates those required changes to the edac_mc.c and edac_mc.h core files by added new Fully Buffered DIMM interface to the EDAC Core module. Signed-off-by: eric wollesen <ericw@xmtp.net> Signed-off-by: doug thompson <norsk5@xmission.com> Acked-by: Alan Cox <alan@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [PATCH] EDAC: Add memory scrubbing controls API to coreFrithiof Jensen2007-02-121-0/+55
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is an attempt of providing an interface for memory scrubbing control in EDAC. This patch modifies the EDAC Core to provide the Interface for memory controller modules to implment. The following things are still outstanding: - K8 is the first implemenation, The patch provide a method of configuring the K8 hardware memory scrubber via the 'mcX' sysfs directory. There should be some fallback to a generic scrubber implemented in software if the hardware does not support scrubbing. Or .. the scrubbing sysfs entry should not be visible at all. - Only works with SDRAM, not cache, The K8 can scrub cache and l2cache also - but I think this is not so useful as the cache is busy all the time (one hopes). One would also expect that cache scrubbing requires hardware support. - Error Handling, I would like that errors are returned to the user in "terms of file system". - Presentation, I chose Bandwidth in Bytes/Second as a representation of the scrubbing rate for the following reasons: I like that the sysfs entries are sort-of textual, related to something that makes sense instead of magical values that must be looked up. "My People" wants "% main memory scrubbed per hour" others prefer "% memory bandwidth used" as representation, "bandwith used" makes it easy to calculate both versions in one-liner scripts. If one later wants to scrub cache, the scaling becomes wierd for K8 changing from "blocks of 64 byte memory" to "blocks of 64 cache lines" to "blocks of 64 bit". Using "bandwidth used" makes sense in all three cases, (I.M.O. anyway ;-). - Discovery, There is no way to discover the possible settings and what they do without reading the code and the documentation. *I* do not know how to make that work in a practical way. - Bugs(??), other tools can set invalid values in the memory scrub control register, those will read back as '-1', requiring the user to reset the scrub rate. This is how *I* think it should be. - Afflicting other areas of code, I made changes to edac_mc.c and edac_mc.h which will show up globally - this is not nice, it would be better that the memory scrubbing fuctionality and interface could be entirely contained within the memory controller it applies to. Frithiof Jensen edac_mc.c and its .h file is a CORE helper module for EDAC driver modules. This provides the abstraction for device specific drivers. It is fine to modify this CORE to provide help for new features of the the drivers doug thompson Signed-off-by: Frithiof Jensen <frithiof.jensen@ericson.com> Signed-off-by: doug thompson <norsk5@xmission.com> Acked-by: Alan Cox <alan@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [PATCH] Add include/linux/freezer.h and move definitions from sched.hNigel Cunningham2006-12-071-0/+1
| | | | | | | | | | | | | Move process freezing functions from include/linux/sched.h to freezer.h, so that modifications to the freezer or the kernel configuration don't require recompiling just about everything. [akpm@osdl.org: fix ueagle driver] Signed-off-by: Nigel Cunningham <nigel@suspend2.net> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Pavel Machek <pavel@ucw.cz> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] edac_mc: fix error handlingAkinobu Mita2006-11-031-18/+27
| | | | | | | | | | Call sysdev_class_unregister() on failure in edac_sysfs_memctrl_setup() and decrease identation level for clear logic. Acked-by: Doug Thompson <norsk5@xmission.com> Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Fix and enable EDAC sysfs operationDoug Thompson2006-07-101-493/+194
| | | | | | | | | | | | | | | | | | | | | | | | | | When EDAC was first introduced into the kernel it had a sysfs interface, but due to some problems it was disabled in 2.6.16 and remained disabled in 2.6.17. With feedback, several of the control and attribute files of that interface had some good constructive feedback. PCI Blacklist/Whitelist was a major set which has design issues and it has been removed in this patch. Instead of storing PCI broken parity status in EDAC, it has been moved to the pci_dev structure itself by a previous PCI patch. A future patch will enable that feature in EDAC by utilizing the pci_dev info. The sysfs is now enabled in this patch, with a minimal set of control and attribute files for examining EDAC state and for enabling/disabling the memory and PCI operations. The Documentation for EDAC has also been updated to reflect the new state of EDAC operation. Signed-off-by:Doug Thompson <norsk5@xmisson.com> Cc: Greg KH <greg@kroah.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivialLinus Torvalds2006-06-301-1/+0
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial: Remove obsolete #include <linux/config.h> remove obsolete swsusp_encrypt arch/arm26/Kconfig typos Documentation/IPMI typos Kconfig: Typos in net/sched/Kconfig v9fs: do not include linux/version.h Documentation/DocBook/mtdnand.tmpl: typo fixes typo fixes: specfic -> specific typo fixes in Documentation/networking/pktgen.txt typo fixes: occuring -> occurring typo fixes: infomation -> information typo fixes: disadvantadge -> disadvantage typo fixes: aquire -> acquire typo fixes: mecanism -> mechanism typo fixes: bandwith -> bandwidth fix a typo in the RTC_CLASS help text smb is no longer maintained Manually merged trivial conflict in arch/um/kernel/vmlinux.lds.S
| * Remove obsolete #include <linux/config.h>Jörn Engel2006-06-301-1/+0
| | | | | | | | | | Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
* | [PATCH] EDAC: mc numbers refactor 1-of-2Doug Thompson2006-06-301-29/+30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Remove add_mc_to_global_list(). In next patch, this function will be reimplemented with different semantics. 1 Reimplement add_mc_to_global_list() with semantics that allow the caller to determine the ID number for a mem_ctl_info structure. Then modify edac_mc_add_mc() so that the caller specifies the ID number for the new mem_ctl_info structure. Platform-specific code should be able to assign the ID numbers in a platform-specific manner. For instance, on Opteron it makes sense to have the ID of the mem_ctl_info structure match the ID of the node that the memory controller belongs to. 2 Modify callers of edac_mc_add_mc() so they use the new semantics. Signed-off-by: Doug Thompson <norsk5@xmission.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] EDAC: PCI device to DEVICE cleanupDoug Thompson2006-06-301-261/+277
|/ | | | | | | | | | | | | | | Change MC drivers from using CVS revision strings for their version number, Now each driver has its own local string. Remove some PCI dependencies from the core EDAC module. Made the code 'struct device' centric instead of 'struct pci_dev' Most of the code changes here are from a patch by Dave Jiang. It may be best to eventually move the PCI-specific code into a separate source file. Signed-off-by: Doug Thompson <norsk5@xmission.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Typo fixesAlexey Dobriyan2006-03-281-1/+1
| | | | | | | | Fix a lot of typos. Eyeballed by jmc@ in OpenBSD. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] EDAC: use EXPORT_SYMBOL_GPLDave Peterson2006-03-261-14/+14
| | | | | | | | | | Change all instances of EXPORT_SYMBOL() in the core EDAC module to EXPORT_SYMBOL_GPL(). Signed-off-by: David S. Peterson <dsp@llnl.gov> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] EDAC: formatting cleanupDave Peterson2006-03-261-176/+149
| | | | | | | | | Cosmetic indentation/formatting cleanup for EDAC code. Make sure we are using tabs rather than spaces to indent, etc. Signed-off-by: David S. Peterson <dsp@llnl.gov> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] EDAC: reorder EXPORT_SYMBOL macrosDave Peterson2006-03-261-25/+13
| | | | | | | | | Fix EDAC code so EXPORT_SYMBOL comes after the function that is being exported. This is to maintain consistency with the rest of the kernel. Signed-off-by: David S. Peterson <dsp@llnl.gov> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] EDAC: protect memory controller listDave Peterson2006-03-261-22/+18
| | | | | | | | | | | | | | | | - Fix code so we always hold mem_ctls_mutex while we are stepping through the list of mem_ctl_info structures. Otherwise bad things may happen if one task is stepping through the list while another task is modifying it. We may eventually want to use reference counting to manage the mem_ctl_info structures. In the meantime we may as well fix this bug. - Don't disable interrupts while we are walking the list of mem_ctl_info structures in check_mc_devices(). This is unnecessary. Signed-off-by: David S. Peterson <dsp@llnl.gov> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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