> > > If all of test_clear_page_dirty() has been commented out then the page > > > will > > > never become clean hence will never fall out of pagecache, so unless > > > Andrei > > > is doing a reboot before checking for corruption, perhaps the underlying > > > data on-disk is incorrect, but we can't see it. > > > > if I do a sync and echo 1 > /proc/sys/vm/drop_caches > > OK, that works. > > > does the reboot is > > still necesary ? > > It might be necessary to reboot in this case - if we're leaving the > pagecache dirty, writing to drop_caches won't remove it. And you probably > won't be able to get a clean reboot either. > > > > > > > Andrei, how _are_ you running this test? What's the exact sequence of > > > steps? > > > > > > In particular, are you doing anything which would cause the corrupted file > > > to be evicted from memory, thus forcing a read from disk? Such as > > > unmounting and then remounting the filesystem? > > > > I boot linux, I start rtorrent and start the download, while it's > > downloading I start evolution and i check my mail(my mbox is very large, > > several hundered megabytes), I close evolution(I use evolution just to > > have another application witch uses the filesystem and the memory), I > > start evolution again. I start firefox. The download is complete. > > Rtorrent says if the hash is good or not. I do a "unrar t qwe.rar" to > > test that all 84 downloaded rar files are ok and see the result. > > > > > > > > The point of my question is to check that the data is really incorrect > > > on-disk, or whether it is incorrect in pagecache.
I rebooted and the files are still broken after reboot(tested twice) so the data is incorrect on disk. > > > > > > Also, it'd be useful if you could determine whether the bug appears with > > > the ext2 filesystem: do s/ext3/ext2/ in /etc/fstab, or boot with > > > rootfstype=ext2 if it's the root filesystem. > > > > I will test. Will test In a couple of hours, I have some work to do... > > ok, thanks. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
