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authorHugh Dickins <hughd@google.com>2011-07-25 17:12:26 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-07-25 20:57:10 -0700
commitd515afe88a32e567c550e3db914f3e378f86453a (patch)
tree0129002decdd5c1f8bcb521aacdba73e0d1699c3 /Documentation/usb/iuu_phoenix.txt
parentd0823576bf4b8eafce1b56f98613465a0352a376 (diff)
tmpfs: no need to use i_lock
2.6.36's 7e496299d4d2 ("tmpfs: make tmpfs scalable with percpu_counter for used blocks") to make tmpfs scalable with percpu_counter used inode->i_lock in place of sbinfo->stat_lock around i_blocks updates; but that was adverse to scalability, and unnecessary, since info->lock is already held there in the fast paths. Remove those uses of i_lock, and add info->lock in the three error paths where it's then needed across shmem_free_blocks(). It's not actually needed across shmem_unacct_blocks(), but they're so often paired that it looks wrong to split them apart. Signed-off-by: Hugh Dickins <hughd@google.com> Acked-by: Tim Chen <tim.c.chen@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation/usb/iuu_phoenix.txt')
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