From: Andy Isaacson <adi@hexapodia.org>
To: Pavel Machek <pavel@suse.cz>
Cc: Felix Oxley <lkml@oxley.org>,
OBATA Noboru <noboru.obata.ar@hitachi.com>,
hyoshiok@miraclelinux.com, linux-kernel@vger.kernel.org
Subject: Re: Linux Kernel Dump Summit 2005
Date: Wed, 12 Oct 2005 11:03:02 -0700 [thread overview]
Message-ID: <20051012180302.GA30732@hexapodia.org> (raw)
In-Reply-To: <20051012100730.GO12682@elf.ucw.cz>
On Wed, Oct 12, 2005 at 12:07:31PM +0200, Pavel Machek wrote:
> On St 12-10-05 10:56:46, Felix Oxley wrote:
> > > See Jamie Lokier's description how to *never* slow down.
> > Sorry, where is this?
>
> Somewhere on the lkml, *long* ago. Basically idea is to have one
> thread doing writing to disk, and second thread doing compression. If
> no compressed pages are available, just write uncompressed ones. That
> way compression can only speed things up.
That's Message-ID: <20040327144945.GG21884@mail.shareable.org>, dated
2004-03-27 14:49:45. (Oh look, sendmail encodes the date in the
Message-ID in exactly that format.)
This technique only works for DMA-capable IO -- PIO will make it suck --
but attempting to dump 32GB via PIO would be insane anyways, so...
-andy
next prev parent reply other threads:[~2005-10-12 18:03 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-21 11:55 Linux Kernel Dump Summit 2005 Hiro Yoshioka
2005-10-06 12:17 ` OBATA Noboru
2005-10-06 14:39 ` Hiro Yoshioka
2005-10-10 8:45 ` Pavel Machek
2005-10-12 8:28 ` OBATA Noboru
2005-10-12 9:02 ` Felix Oxley
2005-10-12 9:09 ` Pavel Machek
2005-10-12 9:56 ` Felix Oxley
2005-10-12 10:07 ` Pavel Machek
2005-10-12 18:03 ` Andy Isaacson [this message]
2005-10-12 22:34 ` Felix Oxley
2005-10-12 11:05 ` jerome lacoste
2005-10-12 21:10 ` Felix Oxley
2005-10-18 13:47 ` OBATA Noboru
2005-10-18 14:10 ` Hugh Dickins
2005-10-19 19:00 ` Theodore Ts'o
2005-10-27 7:48 ` OBATA Noboru
2005-10-11 0:49 ` Andrew Morton
2005-10-11 4:41 ` Hiro Yoshioka
2005-10-12 8:30 ` OBATA Noboru
2005-10-13 5:49 ` Maneesh Soni
2005-10-27 7:45 ` OBATA Noboru
2005-10-13 14:28 ` Troy Heber
2005-10-17 11:19 ` Takao Indoh
2005-10-18 13:48 ` OBATA Noboru
2005-10-19 3:17 ` Takao Indoh
2005-10-27 7:45 ` OBATA Noboru
2005-10-18 14:54 ` Carsten Otte
-- strict thread matches above, loose matches on Subject: below --
2005-10-14 9:19 hideki.takahashi
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