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| author | Dan Williams <dan.j.williams@intel.com> | 2009-07-14 11:48:22 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2009-08-29 19:09:26 -0700 |
| commit | 36d1c6476be51101778882897b315bd928c8c7b5 (patch) | |
| tree | 55b4ecd93ce9c22722c9c9da0dd28a2d2f7c082d /drivers/md/raid5.h | |
| parent | a11034b4282515fd7d9f6fdc0a1380781da461c3 (diff) | |
| download | kernel_samsung_smdk4412-36d1c6476be51101778882897b315bd928c8c7b5.zip kernel_samsung_smdk4412-36d1c6476be51101778882897b315bd928c8c7b5.tar.gz kernel_samsung_smdk4412-36d1c6476be51101778882897b315bd928c8c7b5.tar.bz2 | |
md/raid6: move the spare page to a percpu allocation
In preparation for asynchronous handling of raid6 operations move the
spare page to a percpu allocation to allow multiple simultaneous
synchronous raid6 recovery operations.
Make this allocation cpu hotplug aware to maximize allocation
efficiency.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/md/raid5.h')
| -rw-r--r-- | drivers/md/raid5.h | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/md/raid5.h b/drivers/md/raid5.h index 52ba999..07a7a41 100644 --- a/drivers/md/raid5.h +++ b/drivers/md/raid5.h @@ -383,8 +383,13 @@ struct raid5_private_data { * (fresh device added). * Cleared when a sync completes. */ - - struct page *spare_page; /* Used when checking P/Q in raid6 */ + /* per cpu variables */ + struct raid5_percpu { + struct page *spare_page; /* Used when checking P/Q in raid6 */ + } *percpu; +#ifdef CONFIG_HOTPLUG_CPU + struct notifier_block cpu_notify; +#endif /* * Free stripes pool |