Messages in this thread | | | From | Shlomi Fish <> | Subject | Re: XFS Mount Hangs the Partition (on latest kernel + many old 2.6.x ones) | Date | Thu, 8 Dec 2005 17:55:57 +0200 |
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On Wednesday 07 December 2005 22:55, Nathan Scott wrote: > On Wed, Dec 07, 2005 at 01:57:38PM +0200, Shlomi Fish wrote: > > Hi all! > > Hi there,
Hi Mr. Scott (and all)!
> > > (Please CC me on replies) > > > > I encountered a problem with the Linux kernel handling of XFS, in which > > attempting to mount a certain XFS partition (but not a different one on > > the same hard-disk) caused the mount process to hang, and all other > > XFS-aware apps (like "xfs_check" or "xfs_repair") to hang too. However, > > running xfs_check > > or xfs_repair before the first mount (after a reboot) worked, and > > eventually resolved this problem. > > > > I blogged about it (relatively incoherently) here: > > > > http://www.livejournal.com/~shlomif/7182.html?mode=reply > > http://www.livejournal.com/~shlomif/7547.html?mode=reply > > Unfortunately there's not much information here in your mail or > there that would help us to analyse this further. If you see this > behaviour again could you: > - get sysrq-t information for all hung processes, esp. mount; > - send xfs_info output for the filesystem in question; > - dump the log (xfs_logprint -C) and send it to us.
Sure. But in what order should I do all that?
> > > It all happened after I detected some problems on my Mandriva 2006 system > > (that was using kernel 2.4.15-rc2 from Linus), and then rebooted twice, > > thinking something went wrong. Then a loadlin-booted kernel was unable to > > load the kernel. > > > > Knoppix ran fine, but it also hang up on attempting to mount the XFS > > partition. It used a much older kernel. I then tried to boot Kubuntu > > (which was on another XFS partition on the same disk) and it booted fine. > > Still, it was unable to mount the partition. (It too had an older > > kernel). > > > > After I compiled a 2.6.14.3 kernel, and booted Kubuntu with it, it again > > could not mount the XFS partition, and after doing that xfs_check and > > xfs_repair both hanged up as well. After a reboot, I tried running > > xfs_check > > This was probably caused by the block device being held open > exclusively by the stuck mount process.
I see.
> > > right away on that partition and it worked. So I ran xfs_repair, and > > after it finished, tried to mount the partition it worked. Then Mandriva > > booted fine. > > > > I did not had any problems since then (I have an uptime of 11 days now > > using kernel 2.6.14.3), and so it doesn't seem like a hard disk problem. > > Something using kernel 2.6.15-rc2 caused the XFS partition to become > > defected, and worse - something in all the kernels starting from that of > > the first official Kubuntu release, (or the Knoppix I had), caused an > > attempt to mount the Mandriva partition to hang the process, and > > subsequent accesses to the partition by xfs_check and xfs_repair to fail > > as well. > > > > I can no longer reproduce the problem, but it might be worth going over > > the code. If it helps I can privately send a dump of the first > > 131,072,000 bytes of the XFS partition to someone trustworthy. > > Thats unlikely to help now - repair will have wiped your log clean, > so all evidence of the problem will be gone.
Yes. I thought one can try looking in the XFS mounting code for possible bugs.
Regards,
Shlomi Fish
--------------------------------------------------------------------- Shlomi Fish shlomif@iglu.org.il Homepage: http://www.shlomifish.org/
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