* Re: Nasty regression from .27.7 to .27.8: idle samba goes crazy [not found] ` <pan.2008.12.08.08.07.29.439625@wizards.de> @ 2008-12-08 16:46 ` Stefan Richter 2008-12-08 19:19 ` Stefan Richter 0 siblings, 1 reply; 7+ messages in thread From: Stefan Richter @ 2008-12-08 16:46 UTC (permalink / raw) To: netdev; +Cc: Holger Hoffstaette, linux-kernel, Rafael J. Wysocki, Greg KH, stable Holger Hoffstaette wrote at LKML: > On Mon, 08 Dec 2008 08:34:22 +0100, Rafael J. Wysocki wrote: > >> On Monday, 8 of December 2008, Holger Hoffstaette wrote: >>> Hi, >>> >>> I just encountered a nasty symptom for the second time that has started to >>> occur after updating my home server from vanilla 2.6.27.7 to .8 (same >>> config). >>> >>> A while after disconnecting a samba client, the smbd samba server >>> process goes crazy and consumes 100% CPU. From that time on it is >>> unkillable (kill -9 returns but the process continues to run). The only >>> recourse is reboot, which works without problem (i.e. unmounting the >>> served filesystems is apparently possible?). I tried to attach to the >>> process with gdb but that just hung. >>> >>> The system is a generic old single-core P4 box with a single SATA drive, >>> Gentoo userland and Samba is 3.0.33 (in async mode). The kernel has no >>> patches or binary drivers. It has been rock solid before the update and >>> shows no other signs of weirdness in logs or otherwise. I downgraded to .7 >>> for now and will see what happens, but since it worked before I am certain >>> that this is a regression in the .8 release. >>> >>> The only commonality is a log entry by samba that seems to correlate with >>> both occurrences: >>> >>> [2008/12/08 01:02:52, 0] lib/util_sock.c:read_data(534) >>> read_data: read failure for 4 bytes to client 192.168.100.128. Error = No route to host >>> >>> .128 is the Windows client machine (connected via a stable GigE link), >>> which I shut down pretty much exactly 30 minutes before that (any 30 >>> minute timeouts in the kernel/network stack?). Both instances of these log >>> entries correlate with the CPU spikes which I noticed in my MRTG graphs. >>> >>> Any suspects or ideas? >>> >>> thanks >>> Holger >> >> Please bisect. > > I would love to try, but this is my "production server" (i.e. I need it > for real work) and I'll be traveling the next few days. I will try to > bisect after that (if nobody else has any ideas) but will have to make > sure the bug is actually reproducible after the timeout - for now I only > observed it by accident (via mrtg). > In the meantime maybe someone else will observe it as well. > > thanks > Holger > Added Cc: netdev, readded all other Cc's, quoted in full for netdev. Good luck, -- Stefan Richter -=====-==--- ==-- -=--- http://arcgraph.de/sr/ ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: Nasty regression from .27.7 to .27.8: idle samba goes crazy 2008-12-08 16:46 ` Nasty regression from .27.7 to .27.8: idle samba goes crazy Stefan Richter @ 2008-12-08 19:19 ` Stefan Richter 2008-12-08 20:08 ` Holger Hoffstaette 2008-12-08 22:22 ` Jan Rekorajski 0 siblings, 2 replies; 7+ messages in thread From: Stefan Richter @ 2008-12-08 19:19 UTC (permalink / raw) To: Holger Hoffstaette Cc: netdev, linux-kernel, Rafael J. Wysocki, Greg KH, stable >>> On Monday, 8 of December 2008, Holger Hoffstaette wrote: >>>> The system is a generic old single-core P4 box with a single SATA drive, >>>> Gentoo userland and Samba is 3.0.33 (in async mode). The kernel has no >>>> patches or binary drivers. Holger, it may be unrelated to the issue, but to be sure: Which network card driver do you use? -- Stefan Richter -=====-==--- ==-- -=--- http://arcgraph.de/sr/ ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: Nasty regression from .27.7 to .27.8: idle samba goes crazy 2008-12-08 19:19 ` Stefan Richter @ 2008-12-08 20:08 ` Holger Hoffstaette 2008-12-08 22:22 ` Jan Rekorajski 1 sibling, 0 replies; 7+ messages in thread From: Holger Hoffstaette @ 2008-12-08 20:08 UTC (permalink / raw) To: netdev; +Cc: linux-kernel On Mon, 08 Dec 2008 20:19:37 +0100, Stefan Richter wrote: >>>> On Monday, 8 of December 2008, Holger Hoffstaette wrote: >>>>> The system is a generic old single-core P4 box with a single SATA >>>>> drive, Gentoo userland and Samba is 3.0.33 (in async mode). The >>>>> kernel has no patches or binary drivers. > > Holger, it may be unrelated to the issue, but to be sure: Which network > card driver do you use? e1000 with the older PCI/PCI-X 82545GM rev.04 card in a PCI slot. thanks, Holger ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: Nasty regression from .27.7 to .27.8: idle samba goes crazy 2008-12-08 19:19 ` Stefan Richter 2008-12-08 20:08 ` Holger Hoffstaette @ 2008-12-08 22:22 ` Jan Rekorajski 2008-12-09 17:37 ` Chuck Ebbert 1 sibling, 1 reply; 7+ messages in thread From: Jan Rekorajski @ 2008-12-08 22:22 UTC (permalink / raw) To: linux-kernel Cc: Holger Hoffstaette, netdev, Rafael J. Wysocki, Greg KH, stable, Stefan Richter On Mon, 08 Dec 2008, Stefan Richter wrote: > >>> On Monday, 8 of December 2008, Holger Hoffstaette wrote: > >>>> The system is a generic old single-core P4 box with a single SATA drive, > >>>> Gentoo userland and Samba is 3.0.33 (in async mode). The kernel has no > >>>> patches or binary drivers. > > Holger, it may be unrelated to the issue, but to be sure: Which network > card driver do you use? I think you can safely rule out NIC, I'm also seeing this behaviour on a brand new server with imap hanging in some busy-loop. Network card in my case: Broadcom Corporation NetXtreme II BCM5708 Gigabit Ethernet (rev 12) What I observer was one CPU doing 100% system work, and the number of timer interrupts went from 1k per second to 4k (for the whole system). I didn't report it because I thought it's one of patches I have to blame. Oh, and, unfortunately, I can't bisect, I'm seeing this only on one machine that has to be running. Jan -- Jan Rekorajski | ALL SUSPECTS ARE GUILTY. PERIOD! baggins<at>mimuw.edu.pl | OTHERWISE THEY WOULDN'T BE SUSPECTS, WOULD THEY? BOFH, MANIAC | -- TROOPS by Kevin Rubio ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: Nasty regression from .27.7 to .27.8: idle samba goes crazy 2008-12-08 22:22 ` Jan Rekorajski @ 2008-12-09 17:37 ` Chuck Ebbert 2008-12-09 19:16 ` Manfred Spraul 0 siblings, 1 reply; 7+ messages in thread From: Chuck Ebbert @ 2008-12-09 17:37 UTC (permalink / raw) To: Jan Rekorajski Cc: linux-kernel, Holger Hoffstaette, netdev, Rafael J. Wysocki, Greg KH, stable, Stefan Richter, Manfred Spraul On Mon, 8 Dec 2008 23:22:46 +0100 Jan Rekorajski <baggins@sith•mimuw.edu.pl> wrote: > On Mon, 08 Dec 2008, Stefan Richter wrote: > > > >>> On Monday, 8 of December 2008, Holger Hoffstaette wrote: > > >>>> The system is a generic old single-core P4 box with a single SATA drive, > > >>>> Gentoo userland and Samba is 3.0.33 (in async mode). The kernel has no > > >>>> patches or binary drivers. > > > > Holger, it may be unrelated to the issue, but to be sure: Which network > > card driver do you use? > > I think you can safely rule out NIC, I'm also seeing this behaviour on a > brand new server with imap hanging in some busy-loop. > Network card in my case: > Broadcom Corporation NetXtreme II BCM5708 Gigabit Ethernet (rev 12) > > What I observer was one CPU doing 100% system work, and the number of > timer interrupts went from 1k per second to 4k (for the whole system). > Try reverting the idr patch that went into 2.6.27.8. It broke DRM in the Fedora kernel at least. http://git.kernel.org/?p=linux/kernel/git/stable/stable-queue.git;a=blob_plain;f=releases/2.6.27.8/lib-idr.c-fix-rcu-related-race-with-idr_find.patch;h=b1145766fb9460a0c0285350b49216355c5b4ad8 ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: Nasty regression from .27.7 to .27.8: idle samba goes crazy 2008-12-09 17:37 ` Chuck Ebbert @ 2008-12-09 19:16 ` Manfred Spraul 2008-12-09 19:30 ` Chuck Ebbert 0 siblings, 1 reply; 7+ messages in thread From: Manfred Spraul @ 2008-12-09 19:16 UTC (permalink / raw) To: Chuck Ebbert Cc: Jan Rekorajski, linux-kernel, Holger Hoffstaette, netdev, Rafael J. Wysocki, Greg KH, stable, Stefan Richter, Nadia Derbey Chuck Ebbert wrote: > Try reverting the idr patch that went into 2.6.27.8. It broke DRM in the > Fedora kernel at least. > > What happens? Does it oops, does one of the BUG() statements trigger? -- Manfred ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: Nasty regression from .27.7 to .27.8: idle samba goes crazy 2008-12-09 19:16 ` Manfred Spraul @ 2008-12-09 19:30 ` Chuck Ebbert 0 siblings, 0 replies; 7+ messages in thread From: Chuck Ebbert @ 2008-12-09 19:30 UTC (permalink / raw) To: Manfred Spraul Cc: Jan Rekorajski, linux-kernel, Holger Hoffstaette, netdev, Rafael J. Wysocki, Greg KH, stable, Stefan Richter, Nadia Derbey On Tue, 09 Dec 2008 20:16:34 +0100 Manfred Spraul <manfred@colorfullife•com> wrote: > Chuck Ebbert wrote: > > Try reverting the idr patch that went into 2.6.27.8. It broke DRM in the > > Fedora kernel at least. > > > > > What happens? > Does it oops, does one of the BUG() statements trigger? > It fails in strange ways, e.g. trying to open a DRM device causes it to disappear. (And DRM is a heavy user of idr.) ^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2008-12-09 19:39 UTC | newest]
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2008-12-08 16:46 ` Nasty regression from .27.7 to .27.8: idle samba goes crazy Stefan Richter
2008-12-08 19:19 ` Stefan Richter
2008-12-08 20:08 ` Holger Hoffstaette
2008-12-08 22:22 ` Jan Rekorajski
2008-12-09 17:37 ` Chuck Ebbert
2008-12-09 19:16 ` Manfred Spraul
2008-12-09 19:30 ` Chuck Ebbert
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