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Guillaume Chazarain a écrit : > I get this kind of corruption: > http://guichaz.free.fr/linux-bug/corruption.png Actually in qemu, I get three different behaviours: - no corruption at all : with linux-2.4 - corruption only on the first chunks: before [PATCH] mm: balance dirty pages as identified by Kenneth - corruption of all chunks: after the balance dirty pages patch Bisecting in linux-2.5 land I found http://kernel.org/pub/linux/kernel/people/akpm/patches/2.5/2.5.66/2.5.66-mm3/broken-out/fadvise-flush-data.patch to cause the corruption for me. The attached patch fixes the corruption for me. -- Guillaume diff -r 3859b1144d3a mm/fadvise.c --- a/mm/fadvise.c Sun Dec 24 05:00:03 2006 +0000 +++ b/mm/fadvise.c Thu Dec 28 19:53:40 2006 +0100 @@ -96,9 +96,6 @@ asmlinkage long sys_fadvise64_64(int fd, case POSIX_FADV_NOREUSE: break; case POSIX_FADV_DONTNEED: - if (!bdi_write_congested(mapping->backing_dev_info)) - filemap_flush(mapping); - /* First and last FULL page! */ start_index = (offset+(PAGE_CACHE_SIZE-1)) >> PAGE_CACHE_SHIFT; end_index = (endbyte >> PAGE_CACHE_SHIFT); | ||||||||||
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