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authorBenjamin LaHaise <bcrl@kvack.org>2005-07-12 13:58:22 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-07-12 16:01:01 -0700
commitc40504e87e28c52258458a53fefcd63f58e11a42 (patch)
tree6801c0867e480d80e4bd889662c7bd04f4075e8f /ipc
parent8b8a9da525c592f129ace454c4d82a80b122827a (diff)
downloadlinux-linaro-c40504e87e28c52258458a53fefcd63f58e11a42.tar.gz
[PATCH] uml: tlb flushing fix
This patch fixes a fairly serious tlb flushing bug that makes aio use under uml very unreliable -- SEGVs, Oops and panic()s occur as a result of stale tlb entires being used by uml when aio switches mms due to the fact that uml does not implement the activate_mm() hook. This patch introduces a simple but correct approach (read: hammer) for implementing activate_mm() in uml by doing a force_flush_all() if the new mm is different from old. With this patch in place, uml is able to succeed at the aio test case that was randomly faulting for me before. Cc: Jeff Dike <jdike@addtoit.com> Cc: <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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