Date: Fri, 6 Oct 2006 21:20:20 +0300 From: Kostik Belousov <kostikbel@gmail.com> To: Vivek Khera <vivek@khera.org> Cc: stable@freebsd.org, Kris Kennaway <kris@obsecurity.org> Subject: Re: ffs snapshot lockup Message-ID: <20061006182020.GH26993@deviant.kiev.zoral.com.ua> In-Reply-To: <F314836D-7A2D-416A-8705-33F6E2EE6196@khera.org> References: <555B84D2-520F-44D6-84D6-CF9CE7EE47C7@khera.org> <20060922203654.GA65693@xor.obsecurity.org> <847DD3A5-D5DD-4D3E-B755-64B13D1DA506@khera.org> <20061003084315.GA89654@deviant.kiev.zoral.com.ua> <40CE3CF0-49D2-4335-A0B8-34B5251E9E19@khera.org> <20061005083027.GK89654@deviant.kiev.zoral.com.ua> <5178C89F-B645-4A82-A7C9-FC09D458FE30@khera.org> <20061006073950.GD26993@deviant.kiev.zoral.com.ua> <20061006175714.GA15880@xor.obsecurity.org> <F314836D-7A2D-416A-8705-33F6E2EE6196@khera.org>
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[-- Attachment #1 --] On Fri, Oct 06, 2006 at 02:11:05PM -0400, Vivek Khera wrote: > > On Oct 6, 2006, at 1:57 PM, Kris Kennaway wrote: > > >>This is very strange. You 3 instances of getty where just reading the > >>tty input, and all suspectible processes (like sshd) are waiting > >>on net > >>events. No processes are blocked on the fs. One nfsd is serving > >>the request, > >>and dump is active. > > > >To repeat something I said earlier: when creating a snapshot > >(e.g. which dump -L does), the entire system may become unresponsive > >untilk the snapshot completes, which can take many minutes. > > I know snapshot takes a while -- we're used to that. > > >How long are you waiting before pronouncing the system deadlocked? > > > > > 10's of minutes. > >What does ^T on the console (e.g. when trying to log in), show you? > There were no active snapshotting in the progress. Snapshot was already made, and dump happily processed in the moment captured in the script. > nothing. the console is non-responsive. the remote shells are non > responsive to any input. > > I'm now convinced it was all stemming from some bug in bge driver (at > least for my specific chipset.) Last night I put in an old spare > 3c905 NIC and turned off the motherboard bge via BIOS. > > I can't make the machine lock up at all, even with the watchdog > running, and doing level0 dumps. > > Also, even though this NIC is only 10/100 and the prior was running > at GigE speed, the system is *way* more responsive to network > operations. For example, when I logged in this morning my IMAP mail > client took barely a second or or so to open my inbox, whereas before > it would take upwards of 10 seconds. > > This machine was always this way since it was first set up running > 5.3. I can't believe I lived with it for so long... I'd like to > find a nice stable GigE NIC for it, since I know that the onboard bge > is definitely sub-optimal with FreeBSD. Dell's diagnostics don't > find any hardware fault, for what that's worth. > > Curiously, I have a handful of other Dell servers at the office which > all have bge and run just great at GigE speed to the same switch. > > If it does lock up again, I'll be sure to let you know! > Was this system patched by the stuff I submitted to you ? [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (FreeBSD) iD8DBQFFJp5jC3+MBN1Mb4gRAk9+AKCEQ2EqglvQZ8hZtieYjDEcQlED8ACgg6if 9iALnpP8YUnwh9/bkTb0ZdQ= =XDS/ -----END PGP SIGNATURE-----
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