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| author | Artem Bityutskiy <Artem.Bityutskiy@nokia.com> | 2007-08-28 21:29:32 +0300 |
|---|---|---|
| committer | Artem Bityutskiy <Artem.Bityutskiy@nokia.com> | 2007-10-14 13:10:20 +0300 |
| commit | 33818bbb84cd371b63ed8849cc5264d24c8b3aa2 (patch) | |
| tree | ecee6a8f02d2d103c6eb33cc6173e74343b1861b /drivers/mtd/ubi/eba.c | |
| parent | ef6075fbfca9139f428d52d60e671da38aa2e212 (diff) | |
| download | kernel_samsung_smdk4412-33818bbb84cd371b63ed8849cc5264d24c8b3aa2.zip kernel_samsung_smdk4412-33818bbb84cd371b63ed8849cc5264d24c8b3aa2.tar.gz kernel_samsung_smdk4412-33818bbb84cd371b63ed8849cc5264d24c8b3aa2.tar.bz2 | |
UBI: allocate memory with GFP_NOFS
Use GFP_NOFS flag when allocating memory on I/O path, because otherwise
we may deadlock the filesystem which works on top of us. We observed
the deadlocks with UBIFS. Example:
VFS->FS lock a lock->UBI->kmalloc()->VFS writeback->FS locks the same
lock again.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Diffstat (limited to 'drivers/mtd/ubi/eba.c')
| -rw-r--r-- | drivers/mtd/ubi/eba.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/mtd/ubi/eba.c b/drivers/mtd/ubi/eba.c index 7c5e29e..8919310 100644 --- a/drivers/mtd/ubi/eba.c +++ b/drivers/mtd/ubi/eba.c @@ -157,7 +157,7 @@ static struct ltree_entry *ltree_add_entry(struct ubi_device *ubi, int vol_id, { struct ltree_entry *le, *le1, *le_free; - le = kmem_cache_alloc(ltree_slab, GFP_KERNEL); + le = kmem_cache_alloc(ltree_slab, GFP_NOFS); if (!le) return ERR_PTR(-ENOMEM); @@ -397,7 +397,7 @@ int ubi_eba_read_leb(struct ubi_device *ubi, int vol_id, int lnum, void *buf, retry: if (check) { - vid_hdr = ubi_zalloc_vid_hdr(ubi); + vid_hdr = ubi_zalloc_vid_hdr(ubi, GFP_NOFS); if (!vid_hdr) { err = -ENOMEM; goto out_unlock; @@ -497,7 +497,7 @@ static int recover_peb(struct ubi_device *ubi, int pnum, int vol_id, int lnum, struct ubi_vid_hdr *vid_hdr; unsigned char *new_buf; - vid_hdr = ubi_zalloc_vid_hdr(ubi); + vid_hdr = ubi_zalloc_vid_hdr(ubi, GFP_NOFS); if (!vid_hdr) { return -ENOMEM; } @@ -627,7 +627,7 @@ int ubi_eba_write_leb(struct ubi_device *ubi, int vol_id, int lnum, * The logical eraseblock is not mapped. We have to get a free physical * eraseblock and write the volume identifier header there first. */ - vid_hdr = ubi_zalloc_vid_hdr(ubi); + vid_hdr = ubi_zalloc_vid_hdr(ubi, GFP_NOFS); if (!vid_hdr) { leb_write_unlock(ubi, vol_id, lnum); return -ENOMEM; @@ -738,7 +738,7 @@ int ubi_eba_write_leb_st(struct ubi_device *ubi, int vol_id, int lnum, else ubi_assert(len % ubi->min_io_size == 0); - vid_hdr = ubi_zalloc_vid_hdr(ubi); + vid_hdr = ubi_zalloc_vid_hdr(ubi, GFP_NOFS); if (!vid_hdr) return -ENOMEM; @@ -844,7 +844,7 @@ int ubi_eba_atomic_leb_change(struct ubi_device *ubi, int vol_id, int lnum, if (ubi->ro_mode) return -EROFS; - vid_hdr = ubi_zalloc_vid_hdr(ubi); + vid_hdr = ubi_zalloc_vid_hdr(ubi, GFP_NOFS); if (!vid_hdr) return -ENOMEM; |