Date: Fri, 4 Aug 2017 19:53:07 +0200 From: Ben RUBSON <ben.rubson@gmail.com> To: FreeBSD Net <freebsd-net@freebsd.org> Subject: Re: mlx4en, timer irq @100%... Message-ID: <468D8DC1-2685-4C04-A830-03F8BEFA3408@gmail.com> In-Reply-To: <473e881e-4b36-1538-2d92-7db37fa6f6a5@selasky.org> References: <BF3A3E47-A726-49FB-B83F-666EFC5C0FF1@gmail.com> <72b9de84-5572-3737-b274-34d2c5cdf634@selasky.org> <91DCB96E-4C08-44C5-94E7-E7C686DEFE5F@gmail.com> <c3fdf0bb-833d-915f-c246-9459819cd825@selasky.org> <4DF74CB8-23D2-4CCF-B699-5B86DAEA65E5@gmail.com> <473e881e-4b36-1538-2d92-7db37fa6f6a5@selasky.org>
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> On 04 Aug 2017, at 19:45, Hans Petter Selasky <hps@selasky.org> wrote: >=20 > On 08/04/17 19:42, Ben RUBSON wrote: >>> On 04 Aug 2017, at 19:31, Hans Petter Selasky <hps@selasky.org> = wrote: >>>=20 >>> On 08/04/17 19:13, Ben RUBSON wrote: >>>> 12 100029 intr swi4: clock (0) tcp_tw_2msl_scan = pfslowtimo softclock_call_cc softclock intr_event_execute_handlers = ithread_loop fork_exit fork_trampoline >>>=20 >>> Hi, >>>=20 >>> Can you "procstat -ak" a few times and grep for swi4. If the entry = above does not disappear this is the culpit. Either the callout list is = corrupted or there is an issue inside tcp_tw_2msl_scan(). >> Still here since my log catch 30 minutes ago, and sounds like it does = not want to disappear. >>> I'm CC'ing Glebius hence he's been involved with timer issues in the = kernel earlier. >> Feel free to ask me whatever you need to investigate on this ! >> I let this (production :/) server in this state to have a chance to = get interesting traces. >=20 > Hi, >=20 > I guess we need to involve kgdb to get the full backtrace. Let's wait = and see if anyone here knows how to do it right so the machine doesn't = crash and the state is lost. I used to test kernel dump with "sysctl debug.kdb.panic=3D1" and it = worked correctly. However I'm not sure about debug.minidump, if we can have it enabled or = if it should be set to 0 in our case. Let's wait for others to be sure yes. Ben=
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