netdev - Re: [Bugme-new] [Bug 38032] New: default values of /proc/sys/net/ipv4/udp_mem does not consider huge page allocation

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Date:	Thu, 07 Jul 2011 00:27:17 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	starlight@...nacle.cx, akpm@...ux-foundation.org,
	linux-mm@...ck.org, netdev@...r.kernel.org,
	bugme-daemon@...zilla.kernel.org, aquini@...ux.com
Subject: Re: [Bugme-new] [Bug 38032] New: default values of
 /proc/sys/net/ipv4/udp_mem does not consider huge page allocation

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Thu, 07 Jul 2011 06:38:10 +0200

> [PATCH] net: refine {udp|tcp|sctp}_mem limits
> 
> Current tcp/udp/sctp global memory limits are not taking into account
> hugepages allocations, and allow 50% of ram to be used by buffers of a
> single protocol [ not counting space used by sockets / inodes ...]
> 
> Lets use nr_free_buffer_pages() and allow a default of 1/8 of kernel ram
> per protocol, and a minimum of 128 pages.
> Heavy duty machines sysadmins probably need to tweak limits anyway.
> 
> 
> References: https://bugzilla.stlinux.com/show_bug.cgi?id=38032
> Reported-by: starlight <starlight@...nacle.cx>
> Suggested-by: Andrew Morton <akpm@...ux-foundation.org>
> Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>

Applied.
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