Date: Mon, 24 Jun 2013 17:23:34 -1000 (HST) From: Jeff Roberson <jroberson@jroberson.net> To: Ruslan Bukin <br@bsdpad.com> Cc: Konstantin Belousov <kostikbel@gmail.com>, Zbyszek Bodek <zbb@semihalf.com>, freebsd-current@freebsd.org, freebsd-arm@FreeBSD.org Subject: Re: Kernel build fails on ARM: Cannot fork: Cannot allocate memory Message-ID: <alpine.BSF.2.00.1306241719550.95115@desktop> In-Reply-To: <20130623170507.GA79364@mail.bsdpad.com> References: <alpine.BSF.2.00.1306201350330.2005@desktop> <51C4A067.7010203@semihalf.com> <alpine.BSF.2.00.1306221636360.43796@desktop> <20130623065706.GV91021@kib.kiev.ua> <20130623083220.GA41511@mail.bsdpad.com> <20130623143248.GA91021@kib.kiev.ua> <20130623144346.GA69378@mail.bsdpad.com> <20130623161617.GC91021@kib.kiev.ua> <20130623164425.GA77339@mail.bsdpad.com> <20130623165040.GD91021@kib.kiev.ua> <20130623170507.GA79364@mail.bsdpad.com>
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On Sun, 23 Jun 2013, Ruslan Bukin wrote: > On Sun, Jun 23, 2013 at 07:50:40PM +0300, Konstantin Belousov wrote: >> On Sun, Jun 23, 2013 at 08:44:25PM +0400, Ruslan Bukin wrote: >>> On Sun, Jun 23, 2013 at 07:16:17PM +0300, Konstantin Belousov wrote: >>>> On Sun, Jun 23, 2013 at 06:43:46PM +0400, Ruslan Bukin wrote: >>>>> >>>>> Trying to mount root from ufs:/dev/da0 []... >>>>> WARNING: / was not properly dismounted >>>>> warning: no time-of-day clock registered, system time will not be set accurately >>>>> panic: __rw_wlock_hard: recursing but non-recursive rw pmap pv global @ /usr/home/br/dev/head/sys/arm/arm/pmap-v6.c:1289 >>>>> >>>>> KDB: enter: panic >>>>> [ thread pid 1 tid 100001 ] >>>>> Stopped at kdb_enter+0x48: ldrb r15, [r15, r15, ror r15]! >>>>> db> bt >>>>> Tracing pid 1 tid 100001 td 0xc547f620 >>>>> _end() at 0xde9d0530 >>>>> scp=0xde9d0530 rlv=0xc1211458 (db_trace_thread+0x34) >>>>> rsp=0xde9d0514 rfp=0xc12d1b60 >>>>> Bad frame pointer: 0xc12d1b60 >>>>> db> >>>> This is completely broken. It seems that witness triggered the panic, >>>> and ddb is unable to obtain a backtrace from the normal panic(9) call. >>>> >>>> Show the output of the 'show alllocks'. >>> >>> No such command >> Do you have witness in the kernel config ? If not, add it to the config >> and retry. > > Trying to mount root from ufs:/dev/da0 []... > WARNING: / was not properly dismounted > warning: no time-of-day clock registered, system time will not be set accurately > panic: __rw_wlock_hard: recursing but non-recursive rw pmap pv global @ /usr/home/br/dev/head/sys/arm/arm/pmap-v6.c:1289 > > KDB: enter: panic > [ thread pid 1 tid 100001 ] > Stopped at kdb_enter+0x48: ldrb r15, [r15, r15, ror r15]! > db> show alllocks > Process 1 (kernel) thread 0xc55fc620 (100001) > exclusive sleep mutex pmap (pmap) r = 0 (0xc5600590) locked @ /usr/home/br/dev/head/sys/arm/arm/pmap-v6.c:729 > exclusive rw pmap pv global (pmap pv global) r = 0 (0xc1479dd0) locked @ /usr/home/br/dev/head/sys/arm/arm/pmap-v6.c:728 > shared rw vm object (vm object) r = 0 (0xc1551d4c) locked @ /usr/home/br/dev/head/sys/vm/vm_map.c:1809 > exclusive sx vm map (user) (vm map (user)) r = 0 (0xc5600528) locked @ /usr/home/br/dev/head/sys/kern/imgact_elf.c:445 > exclusive lockmgr ufs (ufs) r = 0 (0xc56f7914) locked @ /usr/home/br/dev/head/sys/kern/imgact_elf.c:821 > exclusive sleep mutex Giant (Giant) r = 0 (0xc147c778) locked @ /usr/home/br/dev/head/sys/kern/vfs_mount.c:1093 > db> > Would any of the arm users be interested in testing a larger patch that changes the way the kernel allocations KVA? It also has some UMA code that lessens kernel memory utilization. http://people.freebsd.org/~jeff/vmem.diff Any reports would be helpful. Is there any ETA on getting stack tracing fixed? I suspect the pmap recursion encountered with Kostik's patch exist in the current kernel. The other changes in this patch my fix that as well. Thanks, Jeffhome | help
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