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From: "Stephen C. Tweedie" <>
To: Jean Delvare <>
Cc: yuval yeret <>,
	LKML <>,
	Stephen Tweedie <>
Subject: Re: 2.4.20-18 size-4096 memory leaks
Date: 26 Nov 2003 11:57:05 +0000	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>


On Wed, 2003-11-26 at 10:57, Jean Delvare wrote:

> I just wanted to let you know that I have been experiencing similar
> leaks. So far, I wasn't enable to find where the leak was, but your
> theory matches my observations:
> 1* On two systems running 2.4.20-2.4.22 kernels, I observed that the
> free memory as reported by top was going down regularly, by blocks of 4
> or 8kB at an average rate of 90kB/min. Sometimes the value would
> stabilize, but I couldn't understand why. What was lost as "free"
> memory
> increased "buffers" from the same amount.

That's not a leak, it simply sounds like cache effects.  atime updates
result in journal commits under ext3, and those use at least a couple of
buffers at a time (one for the metadata descriptor block in the journal,
one for the journal commit.)  Those aren't leaks --- they are temporary
use of cache, and once the IO has complete the memory can be immediately
reclaimed by the kernel if it is needed for anything else.


  reply	other threads:[~2003-11-26 11:57 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-11-26 10:57 Jean Delvare
2003-11-26 11:57 ` Stephen C. Tweedie [this message]
  -- strict thread matches above, loose matches on Subject: below --
2003-11-26 14:14 yuval yeret
2003-11-26 10:24 yuval yeret
2003-11-26  9:29 yuval yeret
2003-11-26 10:11 ` Henrik Storner
2003-11-26 11:51 ` Stephen C. Tweedie

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