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Date:      Thu, 27 Nov 2014 08:51:04 -0800
From:      Adrian Chadd <adrian@freebsd.org>
To:        Ruslan Bukin <br@freebsd.org>
Cc:        Konstantin Belousov <kostikbel@gmail.com>, "svn-src-head@freebsd.org" <svn-src-head@freebsd.org>, "svn-src-all@freebsd.org" <svn-src-all@freebsd.org>, Gleb Smirnoff <glebius@freebsd.org>, "src-committers@freebsd.org" <src-committers@freebsd.org>
Subject:   Re: svn commit: r274914 - in head/sys: kern sys ufs/ffs vm
Message-ID:  <CAJ-Vmo=vaLj6gR7%2BZ2r_a%2B__DcsAjBEjgWGMSsQedezhi7LNKg@mail.gmail.com>
In-Reply-To: <20141125173830.GA60905@bsdpad.com>
References:  <201411231201.sANC1rW1025589@svn.freebsd.org> <20141124110537.GA41282@bsdpad.com> <20141124173733.GI17068@kib.kiev.ua> <20141124180356.GA47782@bsdpad.com> <20141124192902.GQ47144@FreeBSD.org> <20141124211620.GA49975@bsdpad.com> <20141125073145.GT47144@FreeBSD.org> <20141125122754.GA57252@bsdpad.com> <20141125152922.GX47144@FreeBSD.org> <20141125173830.GA60905@bsdpad.com>

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Hi,

Has there been any further progress with this?

If there hasn't, then I'd like to see it backed out for the time
being. I'm worried that this has introduced some subtle bugs and this
isn't yet fully understood.

Thanks,



-adrian


On 25 November 2014 at 09:38, Ruslan Bukin <br@freebsd.org> wrote:
> On Tue, Nov 25, 2014 at 06:29:22PM +0300, Gleb Smirnoff wrote:
>> R> Un-unioning helps partially: I receive much less panics and able to boot until login prompt in ~ 1/3 attempts with patch attached.
>>
>> What happens then? Same panic as w/o patch?
>>
>
> Same random panics:
>
> [..]
> Starting file system checks:
> /dev/vtbd0: 344 files, 22588 used, 3419 free (3 frags, 427 blocks, 0.0% fragmentation)
> MAP: No valid partition found at vtbd0
> MAP: No valid partition found at md0
> MAP: No valid partition found at md0
> panic: vm_page_insert_after: msucc doesn't succeed pindex
> KDB: enter: panic
> [ thread pid 53 tid 100030 ]
> Stopped at      kdb_enter+0x8c: lui     at,0x0
> db> bt
> Tracing pid 53 tid 100030 td 0x9800000000b8f000
> db_trace_thread+40 (?,?,?,?) ra ffffffff80117654 sp c0000000056d90f0 sz 16
> ffffffff801174c8+18c (0,?,ffffffff,?) ra ffffffff80116730 sp c0000000056d9100 sz 48
> ffffffff801162a8+488 (?,?,?,?) ra ffffffff801169fc sp c0000000056d9130 sz 192
> db_command_loop+f4 (?,?,?,?) ra ffffffff8011a570 sp c0000000056d91f0 sz 16
> ffffffff8011a3c8+1a8 (?,?,?,?) ra ffffffff80282338 sp c0000000056d9200 sz 816
> kdb_trap+188 (?,?,?,?) ra ffffffff804b10a4 sp c0000000056d9530 sz 64
> trap+1114 (?,?,?,?) ra ffffffff8049c63c sp c0000000056d9570 sz 288
> MipsKernGenException+154 (0,4,804f60d0,12f) ra ffffffff80281ed4 sp c0000000056d9690 sz 368
> kdb_enter+8c (?,?,?,?) ra ffffffff80234398 sp c0000000056d9800 sz 16
> ffffffff802341e8+1b0 (?,?,?,?) ra ffffffff802344c8 sp c0000000056d9810 sz 32
> kassert_panic+c8 (?,4,b82c00,3d7) ra ffffffff8047c580 sp c0000000056d9830 sz 96
> ffffffff8047c460+120 (?,?,?,?) ra ffffffff8047ff28 sp c0000000056d9890 sz 64
> vm_page_alloc+7f8 (?,?,?,?) ra ffffffff80464524 sp c0000000056d98d0 sz 80
> ffffffff80463a00+b24 (?,?,?,?) ra 0 sp c0000000056d9920 sz 272
> pid 53
>
> Starting file system checks:
> /dev/vtbd0: 344 files, 22588 used, 3419 free (3 frags, 427 blocks, 0.0% fragmentation)
> MAP: No valid partition found at vtbd0
> MAP: No valid partition found at md0
> MAP: No valid partition found at md0
> panic: Bad link elm 0x9800000000bb3000 prev->next != elm
> KDB: enter: panic
> [ thread pid 44 tid 100030 ]
> Stopped at      kdb_enter+0x8c: lui     at,0x0
> db> bt
> Tracing pid 44 tid 100030 td 0x9800000000b8f000
> db_trace_thread+40 (?,?,?,?) ra ffffffff80117654 sp c0000000056d8ea0 sz 16
> ffffffff801174c8+18c (0,?,ffffffff,?) ra ffffffff80116730 sp c0000000056d8eb0 sz 48
> ffffffff801162a8+488 (?,?,?,?) ra ffffffff801169fc sp c0000000056d8ee0 sz 192
> db_command_loop+f4 (?,?,?,?) ra ffffffff8011a570 sp c0000000056d8fa0 sz 16
> ffffffff8011a3c8+1a8 (?,?,?,?) ra ffffffff80282338 sp c0000000056d8fb0 sz 816
> kdb_trap+188 (?,?,?,?) ra ffffffff804b10a4 sp c0000000056d92e0 sz 64
> trap+1114 (?,?,?,?) ra ffffffff8049c63c sp c0000000056d9320 sz 288
> MipsKernGenException+154 (0,4,804f60d0,12f) ra ffffffff80281ed4 sp c0000000056d9440 sz 368
> kdb_enter+8c (?,?,?,?) ra ffffffff80234398 sp c0000000056d95b0 sz 16
> ffffffff802341e8+1b0 (?,?,?,?) ra ffffffff80234400 sp c0000000056d95c0 sz 32
> panic+30 (?,bb3000,8051f738,8051f738) ra ffffffff804790c8 sp c0000000056d95e0 sz 96
> vm_object_deallocate+960 (?,?,?,?) ra ffffffff8046b184 sp c0000000056d9640 sz 96
> ffffffff8046b158+2c (?,?,?,?) ra ffffffff8046b2a4 sp c0000000056d96a0 sz 32
> ffffffff8046b1e8+bc (?,?,?,?) ra ffffffff8046b308 sp c0000000056d96c0 sz 32
> _vm_map_unlock+40 (?,?,?,?) ra ffffffff8046d990 sp c0000000056d96e0 sz 16
> vm_map_remove+98 (?,?,?,?) ra ffffffff801eb2e4 sp c0000000056d96f0 sz 32
> exec_new_vmspace+274 (?,?,?,?) ra ffffffff801c4ea0 sp c0000000056d9710 sz 80
> ffffffff801c4828+678 (?,?,?,?) ra ffffffff801eb81c sp c0000000056d9760 sz 304
> kern_execve+404 (?,?,?,?) ra ffffffff801ec6b4 sp c0000000056d9890 sz 784
> sys_execve+44 (?,?,?,?) ra ffffffff804b0a88 sp c0000000056d9ba0 sz 80
> trap+af8 (?,?,?,?) ra ffffffff8049c880 sp c0000000056d9bf0 sz 288
> MipsUserGenException+13c (?,?,?,600e30b4) ra 0 sp c0000000056d9d10 sz 0
> pid 44
> db>
>
> Ruslan
>



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