From: Eric Dumazet <eric.dumazet@gmail.com>
To: Steven Whitehouse <swhiteho@redhat.com>
Cc: linux-kernel@vger.kernel.org, cluster-devel@redhat.com,
Al Viro <viro@zeniv.linux.org.uk>,
nstraz@redhat.com
Subject: Re: seq_file: Use larger buffer to reduce time traversing lists
Date: Fri, 01 Jun 2012 17:47:45 +0200 [thread overview]
Message-ID: <1338565665.2760.1537.camel@edumazet-glaptop> (raw)
In-Reply-To: <1338564500.2708.73.camel@menhir>
On Fri, 2012-06-01 at 16:28 +0100, Steven Whitehouse wrote:
> I'll certainly have a look at the hash table based approach too.
This is the reasonable approach, because most seq_file users do :
cat /path | ...
FILE *F = fopen("/path", "r");
ie they use small read size (<= 32 KB)
NOWARN can still slow down the whole machine.
You apparently don't have machines with fragmented memory...
hint : __GFP_NORETRY & PAGE_ALLOC_COSTLY_ORDER
next prev parent reply other threads:[~2012-06-01 15:49 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-01 10:39 Steven Whitehouse
2012-06-01 12:10 ` Eric Dumazet
2012-06-01 12:14 ` Eric Dumazet
2012-06-01 12:26 ` Steven Whitehouse
2012-06-01 12:24 ` Steven Whitehouse
2012-06-01 12:48 ` Eric Dumazet
2012-06-01 13:14 ` Steven Whitehouse
2012-06-01 13:27 ` Eric Dumazet
2012-06-01 14:18 ` Steven Whitehouse
2012-06-01 14:57 ` Eric Dumazet
2012-06-01 15:01 ` Eric Dumazet
2012-06-01 15:18 ` Eric Dumazet
2012-06-01 15:30 ` Steven Whitehouse
2012-06-01 15:28 ` Steven Whitehouse
2012-06-01 15:47 ` Eric Dumazet [this message]
2012-06-01 15:54 ` Joe Perches
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