From: Marc MERLIN <marc@merlins.org>
To: Duncan <1i5t5.duncan@cox.net>
Cc: linux-btrfs@vger.kernel.org, takeuchi_satoru@jp.fujitsu.com
Subject: Re: 3.15.0-rc5: now sync and mount are hung on call_rwsem_down_write_failed
Date: Fri, 23 May 2014 07:17:22 -0700 [thread overview]
Message-ID: <20140523141722.GA11991@merlins.org> (raw)
In-Reply-To: <20140523002243.GE12312@merlins.org>
I had btrfs send/receive running.
Plugging the power in caused laptop-mode to remount my root partition.
That hung, and in turn all of btrfs hung too.
7668 root btrfs send home_ro.20140523 -
7669 root btrfs receive /mnt/btrfs_po sleep_on_page
12118 root mount /dev/mapper/cryptroot call_rwsem_down_write_failed
10678 merlin mencoder -passlogfile dsc04 sleep_on_page
Clearly, it takes very little for 3.15rc5 to deadlock :(
(I wasn't running balance or snapshot this time)
I was able to kill btrfs send and receive, but mencoder is very hung, and
sync does not finish either:
10654 merlin sync sync_inodes_sb
17191 merlin sync call_rwsem_down_read_failed
I'm not posting the sysrq-w every time, but I have it available if needed.
Marc
--
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
Microsoft is to operating systems ....
.... what McDonalds is to gourmet cooking
Home page: http://marc.merlins.org/
next prev parent reply other threads:[~2014-05-23 14:17 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-22 9:09 3.15.0-rc5: btrfs and sync deadlock: call_rwsem_down_read_failed Marc MERLIN
2014-05-22 13:15 ` 3.15.0-rc5: btrfs and sync deadlock: call_rwsem_down_read_failed / balance seems to create locks that block everything else Marc MERLIN
2014-05-22 20:52 ` Duncan
2014-05-23 0:22 ` Marc MERLIN
2014-05-23 14:17 ` Marc MERLIN [this message]
2014-05-23 20:24 ` 3.15.0-rc5: now sync and mount are hung on call_rwsem_down_write_failed Chris Mason
2014-05-23 23:13 ` Marc MERLIN
2014-05-27 19:27 ` Chris Mason
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20140523141722.GA11991@merlins.org \
--to=marc@merlins.org \
--cc=1i5t5.duncan@cox.net \
--cc=linux-btrfs@vger.kernel.org \
--cc=takeuchi_satoru@jp.fujitsu.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.