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From: "Fausto Richetti Blanco" <fausto.blanco@gmail.com>
To: linux-kernel@vger.kernel.org
Subject: Pipe buffers' limit of 16 * 4K
Date: Fri, 23 May 2008 21:19:13 -0300	[thread overview]
Message-ID: <d8d698ae0805231719g4202edf2k947bba4128385ab6@mail.gmail.com> (raw)
In-Reply-To: <d8d698ae0805231255i4d0da724p68cb2b9376134797@mail.gmail.com>

Hello guys,

       I'm working with a 2.6.9 kernel (ok, I know it's quite old) and
faced a problem with the 4K (one page) buffer limit for the pipes.
I've found that in the 2.6.11 the pipes' buffers were changed to a
circular list of pages which increased this limit to 16 * 4K. This
limit is hardcoded here /usr/src/linux/include/linux/pipe_fs_i.h:6
#define PIPE_BUFFERS (16)

       Is there a reason for this not to be an adjustable parameter
(eg.: by an ulimit in the userspace) ?

       Can you please CC me on the answer ?

       Thanks in advance,

            Fausto Richetti Blanco

       reply	other threads:[~2008-05-24  0:19 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <d8d698ae0805231255i4d0da724p68cb2b9376134797@mail.gmail.com>
2008-05-24  0:19 ` Fausto Richetti Blanco [this message]
2008-05-24  0:56   ` Rik van Riel
     [not found]     ` <d8d698ae0805261043u125b653ve73d067cd92caa16@mail.gmail.com>
2008-05-28 21:22       ` Fausto Richetti Blanco
2008-05-28 22:05         ` Jan Engelhardt
2008-05-29 13:00           ` Fausto Richetti Blanco
2008-05-29 13:19             ` Miquel van Smoorenburg
2008-05-29 14:36               ` Jan Engelhardt
2008-05-29 15:46                 ` Fausto Richetti Blanco
2008-05-30 10:35                   ` Jens Axboe
2008-06-05  9:55                     ` Jan Engelhardt
2008-06-06  9:19                       ` Jens Axboe
2008-05-26 14:15   ` Jan Engelhardt

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