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authorAndrew Morton <akpm@linux-foundation.org>2007-10-16 23:30:37 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-17 08:43:02 -0700
commit670e4def6ef5f44315d62748134e535b479c784f (patch)
tree808b850c2f08c3d546f6ca06850815324cb770a3 /scripts
parent65cb9b47e0ea568a7a38cce7773052a6ea093629 (diff)
downloadlinux-670e4def6ef5f44315d62748134e535b479c784f.tar.bz2
writeback: fix time ordering of the per superblock dirty inode lists 7
This one fixes four bugs. There are a few situation in there where writeback decides it is going to skip over a blockdev inode on the kernel-internal blockdev superblock. It presently does this by moving the blockdev inode onto the tail of the blockdev superblock's s_dirty. But a) this screws up s_dirty's reverse-time-orderedness and b) refiling the blockdev for writeback in another 30 second is rude. We should try again sooner than that. Fix all this up by using redirty_head(): move the blockdev inode onto the head of the blockdev superblock's s_dirty list for prompt writeback. Cc: Mike Waychison <mikew@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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