All of lore.kernel.org
 help / color / mirror / Atom feed
From: Lukas Hejtmanek <xhejtman@ics.muni.cz>
To: linux-kernel@vger.kernel.org
Subject: 2.6.28-rc8 big regression in VM
Date: Fri, 12 Dec 2008 19:38:10 +0100	[thread overview]
Message-ID: <20081212183810.GA4390@ics.muni.cz> (raw)

Hello,

I noticed that in the current git head, the VM subsystem contains a serious
bug - cached memory is newer freed:

# free; echo 3 > /proc/sys/vm/drop_caches; free
             total       used       free     shared    buffers     cached
Mem:       2016688     669172    1347516          0       2160     335120
-/+ buffers/cache:     331892    1684796
Swap:      1542232          0    1542232
             total       used       free     shared    buffers     cached
Mem:       2016688     659336    1357352          0        320     327288
-/+ buffers/cache:     331728    1684960
Swap:      1542232          0    1542232

the above sequence has been done on completly idle system so there is no
reason for non freeing the cache.

once the whole memory is eaten by the cache, the system is pretty unusable.

-- 
Lukáš Hejtmánek

             reply	other threads:[~2008-12-12 18:37 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-12-12 18:38 Lukas Hejtmanek [this message]
2008-12-13  1:21 ` 2.6.28-rc8 big regression in VM Wu Fengguang
2008-12-13  9:58   ` Lukas Hejtmanek
2008-12-13 14:02     ` Wu Fengguang
2008-12-16 21:08       ` Bill Davidsen
2008-12-15  1:16     ` Wu Fengguang
2008-12-15  2:05       ` KOSAKI Motohiro
2008-12-15  2:05         ` KOSAKI Motohiro
2008-12-15  9:53         ` Lukas Hejtmanek
2008-12-15  9:53           ` Lukas Hejtmanek
2008-12-15 10:56           ` KOSAKI Motohiro
2008-12-15 10:56             ` KOSAKI Motohiro
2008-12-15  9:44       ` Lukas Hejtmanek
2008-12-16  4:59         ` Wu Fengguang
     [not found]           ` <20081216195219.GA4480@ics.muni.cz>
2008-12-17 12:27             ` Wu Fengguang
2008-12-17 12:33               ` Lukas Hejtmanek
2008-12-17 12:44                 ` Wu Fengguang
2008-12-17 12:49                   ` Lukas Hejtmanek
2008-12-17 13:02                     ` Wu Fengguang
2008-12-25 10:50                     ` Wu Fengguang
2008-12-25 10:58                       ` Lukas Hejtmanek
2008-12-25 11:18                         ` Wu Fengguang

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=20081212183810.GA4390@ics.muni.cz \
    --to=xhejtman@ics.muni.cz \
    --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.