On Tue, 2010-11-09 at 13:21 -0500, Shane Shrybman wrote: > On Tue, 2010-11-09 at 08:42 -0500, Chris Mason wrote: > > Excerpts from Shane Shrybman's message of 2010-11-08 12:10:57 -0500: > > > Hi, > > > > > > Got an oops last week while rebalancing that seems to have left me with > > > a corrupted btrfs. Kernel was ~2.6.36 + Transparent hugetlb patchset + > > > small misc. patchs. > > > > We have a confirmed and reproducible case where the transparent > > hugepages are corrupting btrfs (and only btrfs). I'll work with Andrea > > on figuring out the cause. > > > > So, the first step to trying to fix it is to grab the latest btrfsck and > > see if some old copies of the super are working: > > > > btrfsck -s 1 /dev/xxx > > btrfsck -s 2 /dev/xxx > > > > Yeah, I tried that with the latest btrfsck (last commit was: > btrfs-debug-tree: add -d option ...) > > # ./btrfsck -s 1 /dev/sdc1 > using SB copy 1, bytenr 67108864 > checksum verify failed on 625055924224 wanted C3DFFE41 found FFFFFF88 > checksum verify failed on 625055924224 wanted C3DFFE41 found FFFFFF88 > checksum verify failed on 625055924224 wanted C3DFFE41 found FFFFFF88 > Segmentation fault > # ./btrfsck -s 0 /dev/sdc1 > using SB copy 0, bytenr 65536 > checksum verify failed on 625055924224 wanted C3DFFE41 found FFFFFF88 > checksum verify failed on 625055924224 wanted C3DFFE41 found FFFFFF88 > checksum verify failed on 625055924224 wanted C3DFFE41 found FFFFFF88 > Segmentation fault > # ./btrfsck -s 2 /dev/sdc1 > using SB copy 2, bytenr 274877906944 > checksum verify failed on 625055924224 wanted C3DFFE41 found FFFFFF88 > checksum verify failed on 625055924224 wanted C3DFFE41 found FFFFFF88 > checksum verify failed on 625055924224 wanted C3DFFE41 found FFFFFF88 > Segmentation fault > # ./btrfsck -s 3 /dev/sdc1 > using SB copy 3, bytenr 1125899906842624 > No valid Btrfs found on /dev/sdc1 > > Hmm, odd that btrfsck -s 0 /dev/sdc1 finds a different checksum than > before. > Hi Andrea! Long time since our last bug fix :) I still have fond memories of 2.4.23-aa kernels, best of all time! I couldn't find any other mention of this corruption issue with THP and btrfs, so I was just checking to see if there has been any progress? Regards, Shane -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
