Date: Thu, 12 Jun 2014 19:41:52 +0200 From: Hans Petter Selasky <hps@selasky.org> To: Ian Lepore <ian@FreeBSD.org> Cc: "arm@freebsd.org" <arm@FreeBSD.org>, Alan Cox <alc@rice.edu> Subject: Re: RPI-B VM panic Message-ID: <5399E660.5050207@selasky.org> In-Reply-To: <1402594327.20883.216.camel@revolution.hippie.lan> References: <539170AA.2000109@selasky.org> <5396947A.1060601@selasky.org> <5396A0D1.80309@selasky.org> <5396AF63.6040209@selasky.org> <8BA66A45-E08A-475D-A1FA-5047E862681E@rice.edu> <5398B6EA.9030408@selasky.org> <A9433B36-C15C-455E-AB80-3999596936F9@rice.edu> <5398BFD9.60502@selasky.org> <7390A211-C949-4079-B3DA-BF23798B8992@rice.edu> <539942C0.5010706@selasky.org> <5399DF7F.4010501@rice.edu> <5399E349.5050600@selasky.org> <1402594327.20883.216.camel@revolution.hippie.lan>
next in thread | previous in thread | raw e-mail | index | archive | help
On 06/12/14 19:32, Ian Lepore wrote: > On Thu, 2014-06-12 at 19:28 +0200, Hans Petter Selasky wrote: >> On 06/12/14 19:12, Alan Cox wrote: >>> On 06/12/2014 01:03, Hans Petter Selasky wrote: >>>> On 06/11/14 22:47, Alan Cox wrote: >>>>> >>>>> On Jun 11, 2014, at 3:45 PM, Hans Petter Selasky wrote: >>>>> >>>>>> On 06/11/14 22:20, Alan Cox wrote: >>>>>>> >>>>>>> On Jun 11, 2014, at 3:07 PM, Hans Petter Selasky wrote: >>>>>>> >>>>>>>> kernel: file format elf32-littlearm >>>>>>>> >>>>>>> >>>>>>> Then this problem is unrelated to the one that I just fixed. It's >>>>>>> also not a problem that I've seen before. >>>>>> >>>>>> It is happening after your recent patches to -current, optimising >>>>>> the "page ordering". Happens every now and then during boot when >>>>>> stack is growing looks like. >>>>> >>>>> More precisely, which commit is that? >>>>> >>>> >>>>> 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 >>>>> >>>> >>>> >>> >>> That's not exactly a recent commit. It was 13 months ago. And, this >>> code is exercised by all page allocations except for page table pages >>> and uma_small_alloc(). >>> >>> What this assertion is telling us is that somewhere else we have screwed >>> up the vm object to which we are now trying to allocate a page. >>> >>> Try the attached patch. It will provide additional information the next >>> time that the assertion fails. >>> >> >> Here you go: >> >>> panic: vm_page_insert_after: msucc 0xc0993e50 (0) doesn't succeed pindex 4 >>> object 0xc1a2b140 type 0 >>> KDB: enter: panic >>> [ thread pid 18 tid 100052 ] >>> Stopped at $d: ldrb r15, [r15, r15, ror r15]! >>> db> > > Could this be related to changing superpages to enabled by default > recently? Easy to test by setting vm.pmap.sp_enabled=0 in ubldr > Setting the sp_enabled to 0 does not fix the problem. --HPS
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?5399E660.5050207>