All of lore.kernel.org
 help / color / mirror / Atom feed
From: Andrew Morton <akpm@osdl.org>
To: Peter Osterlund <petero2@telia.com>
Cc: pavel@ucw.cz, linux-kernel@vger.kernel.org
Subject: Re: Software suspend testing in 2.6.0-test1
Date: Fri, 18 Jul 2003 09:45:42 -0700	[thread overview]
Message-ID: <20030718094542.07b2685a.akpm@osdl.org> (raw)
In-Reply-To: <m2el0nvnhm.fsf@telia.com>

Peter Osterlund <petero2@telia.com> wrote:
>
> I tried the patch below, but it didn't work. Nothing (or very little)
> was swapped out to disk. I also tried using GFP_KERNEL, but that
> seemed to cause a deadlock. (Maybe it would have gone OOM if I had
> waited long enough). I think the problem is that pdflush and friends
> are already frozen when this code runs.

Oh, we shouldn't be doing this sort of thing when the kernel threads are
refrigerated.  We do need kswapd services for the trick you tried.

And all flavours of ext3_writepage() can block on kjournald activity, so if
kjournald is refrigerated during the memory shrink the machine can deadlock.

It would be much better to freeze kernel threads _after_ doing the big
memory shrink.


  reply	other threads:[~2003-07-18 16:41 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-07-17 19:46 Software suspend testing in 2.6.0-test1 Peter Osterlund
2003-07-17 20:00 ` Pavel Machek
2003-07-17 20:09   ` Andrew Morton
2003-07-18  9:59     ` Peter Osterlund
2003-07-18 10:24       ` Andrew Morton
2003-07-18 15:22         ` Pavel Machek
2003-07-18 15:55           ` Peter Osterlund
2003-07-18 16:45             ` Andrew Morton [this message]
2003-07-18 17:50               ` Pavel Machek
2003-07-18 18:02                 ` Patrick Mochel
2003-07-18 18:04                   ` Pavel Machek
2003-07-18 21:05                     ` Nigel Cunningham
2003-07-18 19:37                 ` Andrew Morton
2003-07-18 19:58               ` Peter Osterlund
2003-07-18 20:15                 ` Andrew Morton
2003-07-18 22:13                   ` Pavel Machek
2003-07-20  0:22                   ` Peter Osterlund
2003-07-20  1:01                     ` Andrew Morton
2003-07-20  7:45                       ` Peter Osterlund
2003-07-18 21:05               ` Nigel Cunningham
2003-07-21 10:00   ` Peter Osterlund
2003-07-21 12:58     ` Pavel Machek
2003-07-21 14:36       ` Peter Osterlund
2003-07-21 21:28         ` Pavel Machek
2003-07-21 23:46           ` Peter Osterlund
2003-07-22 11:04             ` Pavel Machek

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=20030718094542.07b2685a.akpm@osdl.org \
    --to=akpm@osdl.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=pavel@ucw.cz \
    --cc=petero2@telia.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.