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Message-ID: <20161031185514.b22zvbxvga4xcinz@codemonkey.org.uk>
Date: Mon, 31 Oct 2016 14:55:14 -0400
From: Dave Jones <davej@...emonkey.org.uk>
To: Chris Mason <clm@...com>, Jens Axboe <axboe@...com>,
Linus Torvalds <torvalds@...ux-foundation.org>,
Andy Lutomirski <luto@...capital.net>,
Andy Lutomirski <luto@...nel.org>,
Al Viro <viro@...iv.linux.org.uk>, Josef Bacik <jbacik@...com>,
David Sterba <dsterba@...e.com>,
linux-btrfs <linux-btrfs@...r.kernel.org>,
Linux Kernel <linux-kernel@...r.kernel.org>,
Dave Chinner <david@...morbit.com>
Subject: Re: bio linked list corruption.
On Wed, Oct 26, 2016 at 07:47:51PM -0400, Dave Jones wrote:
> On Wed, Oct 26, 2016 at 07:38:08PM -0400, Chris Mason wrote:
>
> > >- hctx->queued++;
> > >- data->hctx = hctx;
> > >- data->ctx = ctx;
> > >+ data->hctx = alloc_data.hctx;
> > >+ data->ctx = alloc_data.ctx;
> > >+ data->hctx->queued++;
> > > return rq;
> > > }
> >
> > This made it through an entire dbench 2048 run on btrfs. My script has
> > it running in a loop, but this is farther than I've gotten before.
> > Looking great so far.
>
> Fixed the splat during boot for me too.
> Now the fun part, let's see if it fixed the 'weird shit' that Trinity
> was stumbling on.
It took a while, but.. bad news.
BUG: Bad page state in process kworker/u8:12 pfn:4e0e39
page:ffffea0013838e40 count:0 mapcount:0 mapping:ffff8804a20310e0 index:0x100c
flags: 0x400000000000000c(referenced|uptodate)
page dumped because: non-NULL mapping
CPU: 3 PID: 1586 Comm: kworker/u8:12 Not tainted 4.9.0-rc3-think+ #1
Workqueue: writeback wb_workfn
(flush-btrfs-2)
ffffc90000777828
ffffffff8130d04c
ffffea0013838e40
ffffffff819ff654
ffffc90000777850
ffffffff81150e5f
0000000000000000
ffffea0013838e40
400000000000000c
ffffc90000777860
ffffffff81150f1a
ffffc900007778a8
Call Trace:
[<ffffffff8130d04c>] dump_stack+0x4f/0x73
[<ffffffff81150e5f>] bad_page+0xbf/0x120
[<ffffffff81150f1a>] free_pages_check_bad+0x5a/0x70
[<ffffffff81153818>] free_hot_cold_page+0x248/0x290
[<ffffffff81153b1b>] free_hot_cold_page_list+0x2b/0x50
[<ffffffff8115c52d>] release_pages+0x2bd/0x350
[<ffffffff8115da62>] __pagevec_release+0x22/0x30
[<ffffffffa00a0d4e>] extent_write_cache_pages.isra.48.constprop.63+0x32e/0x400 [btrfs]
[<ffffffffa00a1199>] extent_writepages+0x49/0x60 [btrfs]
[<ffffffffa0081840>] ? btrfs_releasepage+0x40/0x40 [btrfs]
[<ffffffffa007e993>] btrfs_writepages+0x23/0x30 [btrfs]
[<ffffffff8115ac4c>] do_writepages+0x1c/0x30
[<ffffffff811f69f3>] __writeback_single_inode+0x33/0x180
[<ffffffff811f71e8>] writeback_sb_inodes+0x2a8/0x5b0
[<ffffffff811f757d>] __writeback_inodes_wb+0x8d/0xc0
[<ffffffff811f7833>] wb_writeback+0x1e3/0x1f0
[<ffffffff811f7d72>] wb_workfn+0xd2/0x280
[<ffffffff810908d5>] process_one_work+0x1d5/0x490
[<ffffffff81090875>] ? process_one_work+0x175/0x490
[<ffffffff81090bd9>] worker_thread+0x49/0x490
[<ffffffff81090b90>] ? process_one_work+0x490/0x490
[<ffffffff81095d4e>] kthread+0xee/0x110
[<ffffffff81095c60>] ? kthread_park+0x60/0x60
[<ffffffff81790b12>] ret_from_fork+0x22/0x30
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