Messages in this thread | | | Date | Thu, 9 Sep 2004 07:40:47 +1000 | From | Nathan Scott <> | Subject | Re: Major XFS problems... |
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Hi there,
On Wed, Sep 08, 2004 at 02:35:24PM +0200, Jakob Oestergaard wrote: > > First XFS bug: > --------------- > http://oss.sgi.com/bugzilla/show_bug.cgi?id=309 > > Submitted in februrary this year - requires server reboot, NFS clients > will then re-trigger the bug immediately after the NFS server is started > again. Clearly not a pleasent problem. > > A fairly simple patch is available, which solves the problem in the most > common cases. This simple patch has *not*yet* been included in 2.6.8.1. >
Have you asked Christoph if he thinks that patch is ready for inclusion? Its possibly just fallen through the cracks.
> Second XFS bug: > --------------- > Also causes the 'kernel BUG at fs/xfs/support/debug.c:106' message to be > printed. This bug is not solved by applying the simple patch to the > first problem. > > How well known this problem is, I don't know - I can get more details on > this if anyone is actually interested in working on fixing XFS.
Yes please (it does help to actually contact the maintainers when reporting bugs...). It is not well known.
> Third XFS bug: > -------------- > XFS causes lowmem oom, triggering the OOM killer. Reported by > as@cohaesio.com on the 18th of august. > > On the 24th of august, William Lee Irwin gives some suggestions and > mentions "xfs has some known bad slab behavior."
Hmm? Which message was that?
> ... > While the small server seems to be running well now, the large one has > an average uptime of about one day (!) Backups will crash it reliably, > when XFS doesn't OOM the box at random.
It would be a good idea to track the memory statistics while you're running your workloads to see where in particular the memory is being used when you hit OOM - /proc/{meminfo,slabinfo,buddyinfo}. I'd also be interested to hear if that vfs_cache_pressure tweak that someone recommended helps your load at all, thanks.
Is this xfsdump you're running for backups?
> Is anyone actually maintaining/bugfixing XFS?
Yes, there's a group of people actively working on it.
> Yes, I know the MAINTAINERS file,
But haven't figured out how to use it yet?
> ... > trivial-to-trigger bugs that crash the system and have simple fixes, > have not been fixed in current mainline kernels.
If you have trivial-to-trigger bugs (or other bugs) then please let the folks at linux-xfs@oss.sgi.com know all the details (test cases, etc, are quite useful).
cheers.
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