From: "Theodore Ts'o" <tytso@mit.edu>
To: Justin Piszcz <jpiszcz@lucidpixels.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: 3.6.0 ext4 dump/filemap_fault?
Date: Mon, 29 Oct 2012 18:35:03 -0400 [thread overview]
Message-ID: <20121029223503.GA9532@thunk.org> (raw)
In-Reply-To: <CAO9zADx=DHHDcj3by9RSMatN4RFOQLzWwPJCZzs=NemQ4_sOUQ@mail.gmail.com>
On Mon, Oct 29, 2012 at 05:51:37PM -0400, Justin Piszcz wrote:
>
> > What happened afterwards?
> It did eventually complete.
>
> > How much memory do you have in your system?
> 32GB memory/32GB swap
> > Did the system continue, and did the sync command (I presume you ran
> > "sync" from the command line?) finally return to the command prompt?
> In this case I did not run sync, I waited for the processes/dump/etc
> to complete.
OK, well *some* process must have issued a sync system call, since
that was what triggered the soft lockup. If half your memory was
dirtied, then the time it might take to write back 16 gigs would
roughly:
(16 GB * 1024 MB/G) / 100 MB/s = 163 seconds
... which would be enough to trigger the soft lockup error.
- Ted
prev parent reply other threads:[~2012-10-29 22:35 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-28 21:02 3.6.0 ext4 dump/filemap_fault? Justin Piszcz
2012-10-28 22:51 ` Theodore Ts'o
2012-10-29 21:51 ` Justin Piszcz
2012-10-29 22:35 ` Theodore Ts'o [this message]
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=20121029223503.GA9532@thunk.org \
--to=tytso@mit.edu \
--cc=jpiszcz@lucidpixels.com \
--cc=linux-kernel@vger.kernel.org \
/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.