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authorChris Mason <mason@suse.com>2006-02-01 06:06:47 -0500
committerLinus Torvalds <torvalds@g5.osdl.org>2006-02-01 11:53:26 -0500
commitd62b1b87a7d1c3a21dddabed4251763090be3182 (patch)
tree52d563a2af8bde77c9e4638e3636c8cd3bb0c01e /include/asm-sparc/current.h
parentec191574b9c3cb7bfb95e4f803b63f7c8dc52690 (diff)
[PATCH] resierfs: fix reiserfs_invalidatepage race against data=ordered
After a transaction has closed but before it has finished commit, there is a window where data=ordered mode requires invalidatepage to pin pages instead of freeing them. This patch fixes a race between the invalidatepage checks and data=ordered writeback, and it also adds a check to the reiserfs write_ordered_buffers routines to write any anonymous buffers that were dirtied after its first writeback loop. That bug works like this: proc1: transaction closes and a new one starts proc1: write_ordered_buffers starts processing data=ordered list proc1: buffer A is cleaned and written proc2: buffer A is dirtied by another process proc2: File is truncated to zero, page A goes through invalidatepage proc2: reiserfs_invalidatepage sees dirty buffer A with reiserfs journal head, pins it proc1: write_ordered_buffers frees the journal head on buffer A At this point, buffer A stays dirty forever Signed-off-by: Chris Mason <mason@suse.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-sparc/current.h')
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