From: Michael Stone <mstone@mathom.us>
To: Andrew Morton <akpm@osdl.org>
Cc: David Lang <dlang@digitalinsight.com>,
wfg@mail.ustc.edu.cn, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 00/33] Adaptive read-ahead V12
Date: Thu, 25 May 2006 20:48:16 -0400 [thread overview]
Message-ID: <20060526004814.GC27471@mathom.us> (raw)
In-Reply-To: <20060525150149.666c8476.akpm@osdl.org>
On Thu, May 25, 2006 at 03:01:49PM -0700, Andrew Morton wrote:
>If the developers of that program want to squeeze the last 5% out of it
>then sure, I'd expect them to use such OS-provided I/O scheduling
>facilities.
Maybe, if we were talking about squeezing the last 5%. But all
applications should be required to greatly complicate their IO routines
for the last 30%? To reimplement something the kernel already does (at
least to some degree), as opposed to making the kernel implementation
better? "Is that dumb, or what?" :-)
>Database developers do that sort of thing all the time.
Even the oracle people seem to have figured out they were doing too much
that's properly the responsibility of the OS and creating a maintenance
and portability nightmare.
Mike Stone
next prev parent reply other threads:[~2006-05-26 0:48 UTC|newest]
Thread overview: 108+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20060524111246.420010595@localhost.localdomain>
2006-05-24 11:12 ` [PATCH 00/33] Adaptive read-ahead V12 Wu Fengguang
2006-05-25 15:44 ` Andrew Morton
2006-05-25 19:26 ` Michael Stone
2006-05-25 19:40 ` David Lang
2006-05-25 22:01 ` Andrew Morton
2006-05-25 20:28 ` David Lang
2006-05-26 0:48 ` Michael Stone [this message]
[not found] ` <20060526011939.GA6220@mail.ustc.edu.cn>
2006-05-26 1:19 ` Wu Fengguang
2006-05-26 2:10 ` Jon Smirl
2006-05-26 3:14 ` Nick Piggin
2006-05-26 14:00 ` Andi Kleen
2006-05-26 16:25 ` Andrew Morton
2006-05-26 23:54 ` Folkert van Heusden
2006-05-27 0:00 ` Con Kolivas
2006-05-27 0:08 ` Con Kolivas
2006-05-28 22:20 ` Diego Calleja
2006-05-28 22:31 ` kernel
[not found] ` <20060529030445.GB5994@mail.ustc.edu.cn>
2006-05-29 3:04 ` Wu Fengguang
[not found] ` <20060524111857.983845462@localhost.localdomain>
2006-05-24 11:12 ` [PATCH 02/33] radixtree: look-aside cache Wu Fengguang
[not found] ` <20060524111858.357709745@localhost.localdomain>
2006-05-24 11:12 ` [PATCH 03/33] radixtree: hole scanning functions Wu Fengguang
2006-05-25 16:19 ` Andrew Morton
[not found] ` <20060526070416.GB5135@mail.ustc.edu.cn>
2006-05-26 7:04 ` Wu Fengguang
[not found] ` <20060526110559.GA14398@mail.ustc.edu.cn>
2006-05-26 11:05 ` Wu Fengguang
2006-05-26 16:19 ` Andrew Morton
[not found] ` <20060524111858.869793445@localhost.localdomain>
2006-05-24 11:12 ` [PATCH 04/33] readahead: page flag PG_readahead Wu Fengguang
2006-05-25 16:23 ` Andrew Morton
[not found] ` <20060526070646.GC5135@mail.ustc.edu.cn>
2006-05-26 7:06 ` Wu Fengguang
2006-05-24 12:27 ` Peter Zijlstra
[not found] ` <20060524123740.GA16304@mail.ustc.edu.cn>
2006-05-24 12:37 ` Wu Fengguang
2006-05-24 12:48 ` Peter Zijlstra
[not found] ` <20060524111859.540640819@localhost.localdomain>
2006-05-24 11:12 ` [PATCH 05/33] readahead: refactor do_generic_mapping_read() Wu Fengguang
[not found] ` <20060524111859.909928820@localhost.localdomain>
2006-05-24 11:12 ` [PATCH 06/33] readahead: refactor __do_page_cache_readahead() Wu Fengguang
2006-05-25 16:30 ` Andrew Morton
2006-05-25 22:33 ` Paul Mackerras
2006-05-25 22:40 ` Andrew Morton
[not found] ` <20060526071339.GE5135@mail.ustc.edu.cn>
2006-05-26 7:13 ` Wu Fengguang
[not found] ` <20060524111900.419314658@localhost.localdomain>
2006-05-24 11:12 ` [PATCH 07/33] readahead: insert cond_resched() calls Wu Fengguang
[not found] ` <20060524111900.970898174@localhost.localdomain>
2006-05-24 11:12 ` [PATCH 08/33] readahead: common macros Wu Fengguang
2006-05-25 5:56 ` Nick Piggin
[not found] ` <20060525104117.GE4996@mail.ustc.edu.cn>
2006-05-25 10:41 ` Wu Fengguang
2006-05-26 3:33 ` Nick Piggin
[not found] ` <20060526065906.GA5135@mail.ustc.edu.cn>
2006-05-26 6:59 ` Wu Fengguang
[not found] ` <20060525134224.GJ4996@mail.ustc.edu.cn>
2006-05-25 13:42 ` Wu Fengguang
2006-05-25 14:38 ` Andrew Morton
2006-05-25 16:33 ` Andrew Morton
[not found] ` <20060524111901.581603095@localhost.localdomain>
2006-05-24 11:12 ` [PATCH 09/33] readahead: events accounting Wu Fengguang
2006-05-25 16:36 ` Andrew Morton
[not found] ` <20060526070943.GD5135@mail.ustc.edu.cn>
2006-05-26 7:09 ` Wu Fengguang
[not found] ` <20060527132002.GA4814@mail.ustc.edu.cn>
2006-05-27 13:20 ` Wu Fengguang
2006-05-29 8:19 ` Martin Peschke
[not found] ` <20060524111901.976888971@localhost.localdomain>
2006-05-24 11:12 ` [PATCH 10/33] readahead: support functions Wu Fengguang
2006-05-25 5:13 ` Nick Piggin
[not found] ` <20060525111318.GH4996@mail.ustc.edu.cn>
2006-05-25 11:13 ` Wu Fengguang
2006-05-25 16:48 ` Andrew Morton
[not found] ` <20060526073114.GH5135@mail.ustc.edu.cn>
2006-05-26 7:31 ` Wu Fengguang
[not found] ` <20060524111902.491708692@localhost.localdomain>
2006-05-24 11:12 ` [PATCH 11/33] readahead: sysctl parameters Wu Fengguang
2006-05-25 4:50 ` [PATCH 12/33] readahead: min/max sizes Nick Piggin
[not found] ` <20060525121206.GI4996@mail.ustc.edu.cn>
2006-05-25 12:12 ` Wu Fengguang
[not found] ` <20060524111903.510268987@localhost.localdomain>
2006-05-24 11:12 ` [PATCH 13/33] readahead: state based method - aging accounting Wu Fengguang
2006-05-26 17:04 ` Andrew Morton
[not found] ` <20060527062234.GB4991@mail.ustc.edu.cn>
2006-05-27 6:22 ` Wu Fengguang
2006-05-27 7:00 ` Andrew Morton
[not found] ` <20060527072201.GA5284@mail.ustc.edu.cn>
2006-05-27 7:22 ` Wu Fengguang
[not found] ` <20060524111904.019763011@localhost.localdomain>
2006-05-24 11:13 ` [PATCH 14/33] readahead: state based method - data structure Wu Fengguang
2006-05-25 6:03 ` Nick Piggin
[not found] ` <20060525104353.GF4996@mail.ustc.edu.cn>
2006-05-25 10:43 ` Wu Fengguang
2006-05-26 17:05 ` Andrew Morton
[not found] ` <20060527070248.GD4991@mail.ustc.edu.cn>
2006-05-27 7:02 ` Wu Fengguang
[not found] ` <20060527082758.GF4991@mail.ustc.edu.cn>
2006-05-27 8:27 ` Wu Fengguang
[not found] ` <20060524111904.683513683@localhost.localdomain>
2006-05-24 11:13 ` [PATCH 15/33] readahead: state based method - routines Wu Fengguang
2006-05-26 17:15 ` Andrew Morton
[not found] ` <20060527020616.GA7418@mail.ustc.edu.cn>
2006-05-27 2:06 ` Wu Fengguang
[not found] ` <20060524111906.245276338@localhost.localdomain>
2006-05-24 11:13 ` [PATCH 18/33] readahead: initial method - guiding sizes Wu Fengguang
[not found] ` <20060524111906.588647885@localhost.localdomain>
2006-05-24 11:13 ` [PATCH 19/33] readahead: initial method - thrashing guard size Wu Fengguang
[not found] ` <20060524111907.134685550@localhost.localdomain>
2006-05-24 11:13 ` [PATCH 20/33] readahead: initial method - expected read size Wu Fengguang
2006-05-25 5:34 ` [PATCH 22/33] readahead: initial method Nick Piggin
[not found] ` <20060525085957.GC4996@mail.ustc.edu.cn>
2006-05-25 8:59 ` Wu Fengguang
2006-05-26 17:29 ` [PATCH 20/33] readahead: initial method - expected read size Andrew Morton
[not found] ` <20060527063826.GC4991@mail.ustc.edu.cn>
2006-05-27 6:38 ` Wu Fengguang
[not found] ` <20060524111908.569533741@localhost.localdomain>
2006-05-24 11:13 ` [PATCH 23/33] readahead: backward prefetching method Wu Fengguang
2006-05-26 17:37 ` Nate Diller
2006-05-26 19:22 ` Nathan Scott
[not found] ` <20060528123006.GC6478@mail.ustc.edu.cn>
2006-05-28 12:30 ` Wu Fengguang
[not found] ` <20060524111909.147416866@localhost.localdomain>
2006-05-24 11:13 ` [PATCH 24/33] readahead: seeking reads method Wu Fengguang
[not found] ` <20060524111909.635589701@localhost.localdomain>
2006-05-24 11:13 ` [PATCH 25/33] readahead: thrashing recovery method Wu Fengguang
[not found] ` <20060524111910.207894375@localhost.localdomain>
2006-05-24 11:13 ` [PATCH 26/33] readahead: call scheme Wu Fengguang
[not found] ` <20060524111910.544274094@localhost.localdomain>
2006-05-24 11:13 ` [PATCH 27/33] readahead: laptop mode Wu Fengguang
2006-05-26 17:38 ` Andrew Morton
[not found] ` <20060524111911.607080495@localhost.localdomain>
2006-05-24 11:13 ` [PATCH 29/33] readahead: nfsd case Wu Fengguang
[not found] ` <20060524111912.156646847@localhost.localdomain>
2006-05-24 11:13 ` [PATCH 30/33] readahead: turn on by default Wu Fengguang
[not found] ` <20060524111912.485160282@localhost.localdomain>
2006-05-24 11:13 ` [PATCH 31/33] readahead: debug radix tree new functions Wu Fengguang
[not found] ` <20060524111912.967392912@localhost.localdomain>
2006-05-24 11:13 ` [PATCH 32/33] readahead: debug traces showing accessed file names Wu Fengguang
[not found] ` <20060524111913.603476893@localhost.localdomain>
2006-05-24 11:13 ` [PATCH 33/33] readahead: debug traces showing read patterns Wu Fengguang
[not found] ` <20060524111905.586110688@localhost.localdomain>
2006-05-24 11:13 ` [PATCH 17/33] readahead: context based method Wu Fengguang
2006-05-25 5:26 ` Nick Piggin
[not found] ` <20060525080308.GB4996@mail.ustc.edu.cn>
2006-05-25 8:03 ` Wu Fengguang
2006-05-26 17:23 ` Andrew Morton
[not found] ` <20060527021252.GB7418@mail.ustc.edu.cn>
2006-05-27 2:12 ` Wu Fengguang
2006-05-26 17:27 ` Andrew Morton
[not found] ` <20060527080443.GE4991@mail.ustc.edu.cn>
2006-05-27 8:04 ` Wu Fengguang
2006-05-24 12:37 ` Peter Zijlstra
[not found] ` <20060524133353.GA16508@mail.ustc.edu.cn>
2006-05-24 13:33 ` Wu Fengguang
2006-05-24 15:53 ` Peter Zijlstra
[not found] ` <20060525012556.GA6111@mail.ustc.edu.cn>
2006-05-25 1:25 ` Wu Fengguang
[not found] ` <20060524111911.032100160@localhost.localdomain>
2006-05-24 11:13 ` [PATCH 28/33] readahead: loop case Wu Fengguang
2006-05-24 14:01 ` Limin Wang
[not found] ` <20060525154846.GA6907@mail.ustc.edu.cn>
2006-05-25 15:48 ` wfg
2006-05-26 9:53 [PATCH 00/33] Adaptive read-ahead V12 Just Marc
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20060526004814.GC27471@mathom.us \
--to=mstone@mathom.us \
--cc=akpm@osdl.org \
--cc=dlang@digitalinsight.com \
--cc=linux-kernel@vger.kernel.org \
--cc=wfg@mail.ustc.edu.cn \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox