On Tue, Aug 12, 2014 at 02:17:00AM +0200, Carlos E. R. wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA256 > > Content-ID: <alpine.LSU.2.11.1408120142170.21410@minas-tirith.valinor> > > > El 2014-08-12 a las 00:36 +0200, Carlos E. R. escribió: > >El 2014-08-11 a las 16:56 -0500, Mark Tinguely escribió: > > >but all of them are about 401M before compression. The upload will take > >long, my ADSL upload is 0.3M/s at most. > > > I have shared (view) on google drive a folder with the three files. Both > Brian Foster and Mark Tinguely should have got a link on the mail from me. > If somebody else wants access, just tell me. > I see the same thing from repair that was in your repair output: block (1,12608397-12608397) multiply claimed by cnt space tree, state - 2 If I take a look at the btrees as is, I see "235:[12608397,10]" included in the bnobt (fsb 0x200aa55) and "270:[12608397,10]" in the cntbt (fsb 0x2000781). If I skip the mount, zero the log and repair, everything seems Ok. I can allocate the remainder of available space and rm -rf everything in the fs without an error. Once I replay the log, I see "272:[12608397,10] 273:[12608397,10]" in the cntbt, which is clearly a duplicate entry. This is what repair detects and cleans up and seems to lead to the shutdown. E.g., if I mount and use the fs, I can hit an assert or failure just by attempting to allocate the rest of the space in the fs. If that is the state of the fs on disk, it's only a matter of time we explode due to allocating and freeing that range of space or possibly attempting to allocate that space twice. Mark mentioned that he didn't see the superblock item in the log with regard to the freeze. I don't see that either... which perhaps suggests that this all happens during the wake-from-hibernate sequence..? My understanding is that we should freeze on hibernate, thus force everything out to the log, write an unmount record and then dirty the log with a superblock transaction. Therefore, that should be the only item in the log post-freeze. Here, we have various items in the log including several logged buffers that correspond to the cntbt block that ends up corrupted (daddr 0xf427c08). Given the failure occurs on freeing an extent via the xfs_eofblocks scanner, perhaps this extent was initially allocated as speculative preallocation and the eofblocks scanner is where we happen to first identify the corrupted cntbt. What is strange is that, as mentioned previously, the space appears to be free if I zero the log, so that means it was probably free before the freeze. It seems highly unlikely for a file to gain preallocation, be written out and then get trimmed by the scanner all on wake-from-hibernate. Carlos, How long after hibernate does the shutdown/crash typically occur? Do you basically wake-up and within a few seconds the filesystem crashes, or is it some time (minutes) later? If the former, I wonder if it's possible that the scanner returns to life pointing to a stale or freed incore inode and does something bogus based on that. Brian > - -- Cheers > Carlos E. R. > > (from 13.1 x86_64 "Bottle" (Minas Tirith)) > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v2.0.22 (GNU/Linux) > > iF4EAREIAAYFAlPpXQYACgkQja8UbcUWM1wQ9gEAl1WI24UDArdlWHh3J2ih3AV3 > nMTwDRqTrT0Rk2BJOB8A/1BOzzn3/IX16sPCsYoqGEyXNHcNXWBHENShlyWzJGUr > =W+BG > -----END PGP SIGNATURE----- > _______________________________________________ > xfs mailing list > xfs@xxxxxxxxxxx > http://oss.sgi.com/mailman/listinfo/xfs _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
