Messages in this thread | | | Date | Thu, 28 Dec 2006 15:54:00 -0800 (PST) | From | Linus Torvalds <> | Subject | Re: 2.6.19 file content corruption on ext3 |
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On Thu, 28 Dec 2006, Anton Altaparmakov wrote: > > But are chunks 3 and 4 in separate buffer heads? Sorry could not see it > immediately from the output you showed...
No, this is a 4kB filesystem. A single bh per page.
> It is just that there may be a different cause rather than buffer dirty > state...
Sure.
> A shot in the dark I know but it could perhaps be that a "COW for > MAP_PRIVATE" like event happens when the page is dirty already thus the > second write never actually makes it to the shared page thus it never gets > written out.
There are no private mappings anywhere, and no forks. Just a single mmap (well, we unmap and remap in order to force the page cache to be invalidated properly with the posix_fadvise() thing, but that's literally the only user).
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