Date: Thu, 12 Jun 2014 08:06:05 +0200 From: Hans Petter Selasky <hps@selasky.org> To: Michael Tuexen <tuexen@freebsd.org> Cc: freebsd-arm <freebsd-arm@freebsd.org> Subject: Re: RPI-B VM panic Message-ID: <5399434D.2070008@selasky.org> In-Reply-To: <AA183785-AC40-4A48-BFB2-5A6B1368ECB5@freebsd.org> References: <539170AA.2000109@selasky.org> <5398B50A.1070301@selasky.org> <AA183785-AC40-4A48-BFB2-5A6B1368ECB5@freebsd.org>
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On 06/11/14 22:51, Michael Tuexen wrote: > On 11 Jun 2014, at 21:59, Hans Petter Selasky <hps@selasky.org> wrote: > >> On 06/06/14 09:41, Hans Petter Selasky wrote: >>> Hi, >>> >>> I'm seeing this with RPI-B: >>> >>> panic: vm_page_insert_after: msucc doesn't succeed pindex >>> KDB: enter: panic >>> [ thread pid 18 tid 100052 ] >>> Stopped at $d: ldrb r15, [r15, r15, ror r15]! >>> db> >>> >>> >>> Any ideas? > Which revision are you using? What is triggering the panic? I could > try to reproduce the problem. > > I've used r267055 with reverted r266083 for a couple of days and > it was running stable. It compiled a lot of ports including wireshark. > Hi, I'm running -current with a patch reverted for the CPU counter. It happens around growfs. The error is not constant. If I change the boot timing by plugging more USB devices, then I sometimes can pass the point of error. I think the problem is related to the following commit: > commit 7d20e37fb658b0e2cd7f3c13dac8022e0e866a21 > Author: alc <alc@FreeBSD.org> > Date: Sun May 12 16:50:18 2013 +0000 > > Refactor vm_page_alloc()'s interactions with vm_reserv_alloc_page() and > vm_page_insert() so that (1) vm_radix_lookup_le() is never called while the > free page queues lock is held and (2) vm_radix_lookup_le() is called at most > once. This change reduces the average time that the free page queues lock > is held by vm_page_alloc() as well as vm_page_alloc()'s average overall > running time. > > Sponsored by: EMC / Isilon Storage Division > Looks like we are trying to grow the stack and then the pages are not in the expected order. --HPS
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