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authorNeilBrown <neilb@suse.de>2006-06-23 02:05:48 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-23 07:43:07 -0700
commite0f23603fb2607315ce52432cc4225df410828cf (patch)
tree7a32b42a64a64488aee0e91ab016d53c353f9482 /kernel
parent57ae2508610d50893cb3e3bbb869ff70ff724a2a (diff)
[PATCH] Remove semi-softlockup from invalidate_mapping_pages
If invalidate_mapping_pages is called to invalidate a very large mapping (e.g. a very large block device) and if the only active page in that device is near the end (or at least, at a very large index), such as, say, the superblock of an md array, and if that page happens to be locked when invalidate_mapping_pages is called, then pagevec_lookup will return this page and as it is locked, 'next' will be incremented and pagevec_lookup will be called again. and again. and again. while we count from 0 upto a very large number. We should really always set 'next' to 'page->index+1' before going around the loop again, not just if the page isn't locked. Cc: "Steinar H. Gunderson" <sgunderson@bigfoot.com> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions