Hello Ted, Tuesday, June 5, 2012, 11:08:06 PM, you wrote: > On Tue, Jun 05, 2012 at 10:41:54PM +0200, Sander Eikelenboom wrote: >> >> > Today I've finally managed to bisect this to here: >> > [fd034a84e1ea5c8c8d159cd2089c32e792c269b0] ext4: split out ext4_free_blocks_after_init() >> >> > If I revert all the "ext4:" patches in 3.2 up to and including that one, >> > I get normal behavior again. > This is excellent. Thanks! I'll take a deep look at that ocmmit to > see what might be going on. >> So somehow this only effects ext4 on DM (it's THE common factor in all reports) and fsck seems incapable of seeing the error (and thus repair it.) > What's probably happening is it's only the in-memory copy of the > bitmap which is getting corrupted, and because the file system is > getting remounted read-only, the corrupted bitmap is not getting > written back to disk. (This is the whole point of remount-ro when fs > corruptions are detected. :-) The commits Kees pointed too, made me: - Copy files to the fs and trigger the error. - "fsck -v -f", no errors where reported, only journal recovered. - "tune2fs -O ^uninit_bg" on the fs. - "fsck -v -f", which found some bitmap size errors now, let it fix these. - Mounted the fs - Copy the same set of files, no error has occured. So it seems related to the uninit_bg changes in the commits on 10 september 2011. -- Sander > Cheers, > - Ted -- Best regards, Sander mailto:linux@xxxxxxxxxxxxxx -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
