* Re: 4.5.0 rc7 balance btrfs/extent-tree.c:7964 btrfs_alloc_tree_block+0x417/0x500
[not found] <CAJCQCtQt8J697-mABAr+4Wdaf7Kw-sX6yLHwwyLGJ9kJFFG7xw@mail.gmail.com>
@ 2016-03-13 22:01 ` Chris Murphy
2016-03-13 22:14 ` Chris Murphy
0 siblings, 1 reply; 3+ messages in thread
From: Chris Murphy @ 2016-03-13 22:01 UTC (permalink / raw)
To: Btrfs BTRFS
This didn't make it to the list, probably because of the attachment,
so dmesg is attached to this bug:
https://bugzilla.kernel.org/show_bug.cgi?id=114541
On Sun, Mar 13, 2016 at 3:37 PM, Chris Murphy <lists@colorremedies.com> wrote:
> Today I saw two warnings during a filtered balance, -dusage=50 -musage=50.
>
> [61425.186172] [<ffffffff813d497f>] dump_stack+0x63/0x84
> [61425.186176] [<ffffffff810a6142>] warn_slowpath_common+0x82/0xc0
> [61425.186178] [<ffffffff810a61dc>] warn_slowpath_fmt+0x5c/0x80
> [61425.186183] [<ffffffff813da662>] ? ___ratelimit+0xb2/0x100
> [61425.186198] [<ffffffffa05105f7>] btrfs_alloc_tree_block+0x417/0x500 [btrfs]
> [61425.186201] [<ffffffff810e1db7>] ? update_sd_lb_stats+0x107/0x500
> [61425.186214] [<ffffffffa04f7022>] btrfs_copy_root+0x102/0x2b0 [btrfs]
> [61425.186232] [<ffffffffa05709cd>] create_reloc_root+0x19d/0x220 [btrfs]
> [61425.186249] [<ffffffffa0576b66>] btrfs_init_reloc_root+0x96/0xb0 [btrfs]
> [61425.186264] [<ffffffffa051fee4>] record_root_in_trans+0xa4/0x100 [btrfs]
> [61425.186279] [<ffffffffa05216d4>]
> btrfs_record_root_in_trans+0x44/0x70 [btrfs]
> [61425.186293] [<ffffffffa0522906>] start_transaction+0x96/0x4a0 [btrfs]
> [61425.186308] [<ffffffffa0522d67>] btrfs_join_transaction+0x17/0x20 [btrfs]
> [61425.186322] [<ffffffffa0528cec>] btrfs_dirty_inode+0x3c/0xd0 [btrfs]
> [61425.186336] [<ffffffffa0528dfd>] btrfs_update_time+0x7d/0xb0 [btrfs]
> [61425.186340] [<ffffffff8125dfdd>] file_update_time+0xbd/0x110
> [61425.186355] [<ffffffffa05330e9>] btrfs_page_mkwrite+0xc9/0x3f0 [btrfs]
> [61425.186357] [<ffffffff810de475>] ? put_prev_entity+0x35/0x7f0
> [61425.186361] [<ffffffff811e63da>] do_page_mkwrite+0x7a/0x120
> [61425.186364] [<ffffffff811e89f9>] do_wp_page+0x1a9/0x890
> [61425.186367] [<ffffffff811eb848>] handle_mm_fault+0x818/0x1bd0
> [61425.186369] [<ffffffff810696c5>] __do_page_fault+0x195/0x400
> [61425.186372] [<ffffffff81069960>] do_page_fault+0x30/0x80
> [61425.186374] [<ffffffff81003d19>] ? syscall_return_slowpath+0x79/0xb0
> [61425.186378] [<ffffffff817cfec8>] page_fault+0x28/0x30
> [61425.186399] ---[ end trace 2c5c3c76646758b9 ]---
>
> There is, since kernel 4.4.x this dump_pagetables message that happens
> every boot, that taints the kernel.
> WARNING: CPU: 0 PID: 1 at arch/x86/mm/dump_pagetables.c:225
> note_page+0x635/0x7e0()
>
> Including entire dmesg as attachment. So far no apparent negative
> consequence, the balance completes normally.
--
Chris Murphy
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: 4.5.0 rc7 balance btrfs/extent-tree.c:7964 btrfs_alloc_tree_block+0x417/0x500
2016-03-13 22:01 ` 4.5.0 rc7 balance btrfs/extent-tree.c:7964 btrfs_alloc_tree_block+0x417/0x500 Chris Murphy
@ 2016-03-13 22:14 ` Chris Murphy
2016-03-13 22:35 ` Chris Murphy
0 siblings, 1 reply; 3+ messages in thread
From: Chris Murphy @ 2016-03-13 22:14 UTC (permalink / raw)
To: Btrfs BTRFS
Reproducible with Not tainted 4.4.5-300.fc23.x86_64. Attached new
dmesg to bug report, direct link is:
https://bugzilla.kernel.org/attachment.cgi?id=208951
Chris Murphy
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: 4.5.0 rc7 balance btrfs/extent-tree.c:7964 btrfs_alloc_tree_block+0x417/0x500
2016-03-13 22:14 ` Chris Murphy
@ 2016-03-13 22:35 ` Chris Murphy
0 siblings, 0 replies; 3+ messages in thread
From: Chris Murphy @ 2016-03-13 22:35 UTC (permalink / raw)
To: Btrfs BTRFS
On Sun, Mar 13, 2016 at 4:14 PM, Chris Murphy <lists@colorremedies.com> wrote:
> Reproducible with Not tainted 4.4.5-300.fc23.x86_64. Attached new
> dmesg to bug report, direct link is:
> https://bugzilla.kernel.org/attachment.cgi?id=208951
The warning doesn't happen if enospc_debug mount option is not set. If
set, it always happens. However,
# CONFIG_BTRFS_DEBUG is not set
--
Chris Murphy
^ permalink raw reply [flat|nested] 3+ messages in thread
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2016-03-13 22:01 ` 4.5.0 rc7 balance btrfs/extent-tree.c:7964 btrfs_alloc_tree_block+0x417/0x500 Chris Murphy
2016-03-13 22:14 ` Chris Murphy
2016-03-13 22:35 ` Chris Murphy
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