path: root/lib/atomic64.c
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authorEric Sandeen <sandeen@sandeen.net>2009-07-29 15:02:16 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-07-29 19:10:35 -0700
commite4c6f8bed01f9f9a5c607bd689bf67e7b8a36bd8 (patch)
treed344bc7b6f89f7066c7e35ddff8c4a4b56904a36 /lib/atomic64.c
parent659098141d02eb8e3545be8969d262e02d2f3f98 (diff)
hugetlbfs: fix i_blocks accounting
As reported in Red Hat bz #509671, i_blocks for files on hugetlbfs get accounting wrong when doing something like: $ > foo $ date > foo date: write error: Invalid argument $ /usr/bin/stat foo File: `foo' Size: 0 Blocks: 18446744073709547520 IO Block: 2097152 regular ... This is because hugetlb_unreserve_pages() is unconditionally removing blocks_per_huge_page(h) on each call rather than using the freed amount. If there were 0 blocks, it goes negative, resulting in the above. This is a regression from commit a5516438959d90b071ff0a484ce4f3f523dc3152 ("hugetlb: modular state for hugetlb page size") which did: - inode->i_blocks -= BLOCKS_PER_HUGEPAGE * freed; + inode->i_blocks -= blocks_per_huge_page(h); so just put back the freed multiplier, and it's all happy again. Signed-off-by: Eric Sandeen <sandeen@redhat.com> Acked-by: Andi Kleen <andi@firstfloor.org> Cc: William Lee Irwin III <wli@holomorphy.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/atomic64.c')
0 files changed, 0 insertions, 0 deletions

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