Messages in this thread | ![/](/images/icornerl.gif) | | Date | Sun, 31 Dec 2006 14:55:58 +1100 | From | Nick Piggin <> | Subject | Re: VM: Fix nasty and subtle race in shared mmap'ed page writeback |
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Andrea Gelmini wrote: > On Fri, Dec 29, 2006 at 06:59:02PM +0000, Linux Kernel Mailing List wrote: > >>Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=7658cc289288b8ae7dd2c2224549a048431222b3 >>Commit: 7658cc289288b8ae7dd2c2224549a048431222b3 >>Parent: 3bf8ba38f38d3647368e4edcf7d019f9f8d9184a >>Author: Linus Torvalds <torvalds@macmini.osdl.org> >>AuthorDate: Fri Dec 29 10:00:58 2006 -0800 >>Committer: Linus Torvalds <torvalds@macmini.osdl.org> >>CommitDate: Fri Dec 29 10:00:58 2006 -0800 >> >> VM: Fix nasty and subtle race in shared mmap'ed page writeback > > > With 2.6.20-rc2-git1, which contain this patch, I have no more Berkeley > DB corruption with Klibido. > I'm afraid a lot of software project switched to Sqlite, from BDB, > because the bug this patch fix (ie. http://bogofilter.sourceforge.net/). > I've also thought, since years, it was an userland problem.
This bug was only introduced in 2.6.19, due to a change that caused pte dirty bits to be discarded without a subsequent set_page_dirty() (nowhere else in the kernel should have done this).
So if your corruption is years old, then it must be something else. Maybe it is hidden by a timing change, or BDB isn't using msync properly.
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