From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Linus Torvalds <torvalds@osdl.org>,
William Lee Irwin III <wli@holomorphy.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Make pipe data structure be a circular list of pages, rather than
Date: Fri, 07 Jan 2005 15:45:58 +0000 [thread overview]
Message-ID: <1105110401.17166.346.camel@localhost.localdomain> (raw)
In-Reply-To: <41DE9D10.B33ED5E4@tv-sign.ru>
On Gwe, 2005-01-07 at 14:30, Oleg Nesterov wrote:
> will block after writing PIPE_BUFFERS == 16 characters, no?
> And pipe_inode_info will use 64K to hold 16 bytes!
>
> Is it ok?
That would break stuff, but holding the last page until it fills 4K
would work, or just basic sg coalescing when possible. The pipe
behaviour - particularly size and size of atomic writes is defined by
SuS and there are people who use pipes two ways between apps and use the
guarantees to avoid deadlocks
next prev parent reply other threads:[~2005-01-07 16:53 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-01-07 14:30 Make pipe data structure be a circular list of pages, rather than Oleg Nesterov
2005-01-07 15:45 ` Alan Cox [this message]
2005-01-07 17:23 ` Linus Torvalds
2005-01-08 18:25 ` Hugh Dickins
2005-01-08 18:54 ` Linus Torvalds
2005-01-07 16:17 ` Linus Torvalds
2005-01-07 16:06 ` Alan Cox
2005-01-07 17:33 ` Linus Torvalds
2005-01-07 17:48 ` Linus Torvalds
2005-01-07 20:59 ` Mike Waychison
2005-01-07 23:46 ` Chris Friesen
2005-01-08 21:38 ` Lee Revell
2005-01-08 21:51 ` Linus Torvalds
2005-01-08 22:02 ` Lee Revell
2005-01-08 22:29 ` Davide Libenzi
2005-01-09 4:07 ` Linus Torvalds
2005-01-09 23:19 ` Davide Libenzi
2005-01-14 10:15 ` Peter Chubb
2005-01-07 21:59 ` Linus Torvalds
2005-01-07 22:53 ` Diego Calleja
2005-01-07 23:15 ` Linus Torvalds
2005-01-10 23:23 ` Robert White
2005-01-07 17:45 ` Chris Friesen
2005-01-07 16:39 ` Davide Libenzi
2005-01-07 17:09 ` Linus Torvalds
2005-08-18 6:07 ` Coywolf Qi Hunt
-- strict thread matches above, loose matches on Subject: below --
2005-01-20 2:14 Robert White
2005-01-16 2:59 Make pipe data structure be a circular list of pages, rather Linus Torvalds
2005-01-19 21:12 ` Make pipe data structure be a circular list of pages, rather than linux
2005-01-20 2:06 ` Robert White
[not found] <Pine.LNX.4.44.0501091946020.3620-100000@localhost.localdomain>
[not found] ` <Pine.LNX.4.58.0501091713300.2373@ppc970.osdl.org>
[not found] ` <Pine.LNX.4.58.0501091830120.2373@ppc970.osdl.org>
2005-01-12 19:50 ` Davide Libenzi
2005-01-12 20:10 ` Linus Torvalds
[not found] <200501070313.j073DCaQ009641@hera.kernel.org>
2005-01-07 3:41 ` William Lee Irwin III
2005-01-07 6:35 ` Linus Torvalds
2005-01-07 6:37 ` Linus Torvalds
2005-01-19 16:29 ` Larry McVoy
2005-01-19 17:14 ` Linus Torvalds
2005-01-19 19:01 ` Larry McVoy
2005-01-20 0:01 ` Linus Torvalds
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