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Message-ID: <728201270601131004l6a3ed526q3846d4c485e3fc07@mail.gmail.com>
Date: Fri, 13 Jan 2006 12:04:04 -0600
From: Ram Gupta <ram.gupta5@gmail.com>
To: Jim MacBaine <jmacbaine@gmail.com>
Subject: Re: /proc/sys/vm/swappiness == 0 makes OOM killer go beserk
Cc: linux-kernel@vger.kernel.org
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On 1/13/06, Jim MacBaine <jmacbaine@gmail.com> wrote:
> On 1/13/06, Ram Gupta <ram.gupta5@gmail.com> wrote:
> It _would_ be ok if swappiness == 0 would mean that the kernel will
> not swap at all. That's not the case. Even without an excessive use of
> tmpfs the kernel found ~250 MB of unused memory which it swapped out
> during the last days with swappiness == 0.
>
> Regards,
> Jim
>

I correct myself. swappiness == 0 does not mean that kernel will not try to
 swap at all but this value decreases the swapping.
swap_tendency = mapped_ratio / 2 + distress + vm_swappiness;

swap_tendency depends on swappiness and affects the memory reclaimation.

Regards
Ram Gupta