linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Nagendra Singh Tomar <nagendra_tomar@adaptec.com>
To: Jamie Lokier <jamie@shareable.org>
Cc: "Tomar, Nagendra" <nagendra_tomar@adaptec.com>,
	Timo Sirainen <tss@iki.fi>, David Schwartz <davids@webmaster.com>,
	<linux-kernel@vger.kernel.org>
Subject: Re: Lockless file reading
Date: Thu, 28 Aug 2003 06:36:12 +0530 (IST)	[thread overview]
Message-ID: <Pine.LNX.4.44.0308280635260.14580-100000@localhost.localdomain> (raw)
In-Reply-To: <20030828130043.GE6800@mail.jlokier.co.uk>


On Thu, 28 Aug 2003, Jamie Lokier wrote:

> Nagendra Singh Tomar wrote:
> > While the write had "12" in its buffers and it  would have grabbed the
> 
> > page lock to write it into the page cache, won't it set some flag
> saying 
> > that I don't want to be prempted now. I think there is a small
> primitive 
> > for it in from 2.5 onwards. I don't think it will be a good idea to
> prempt 
> > while it is holding the page lock. How is it possible that it just
> wrote 
> > "1" and did not write "2" though it had grabbed the page lock for that
> 
> > purpose. 
> 
> Nope.  I don't see any disabling of preemption while the page is held.
> 
> It wouldn't make sense anyway, because the copies to/from userspace
> can sleep, so there's nothing to gain by disabling preemption.

I understand  what you say. Thanx.

> 
> -- Jamie
> 


  reply	other threads:[~2003-08-28 13:07 UTC|newest]

Thread overview: 56+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-08-27 12:37 Lockless file reading Timo Sirainen
2003-08-27 12:42 ` Martin Konold
2003-08-27 12:52   ` Timo Sirainen
2003-08-27 13:40     ` Richard B. Johnson
2003-08-27 14:56       ` Timo Sirainen
2003-08-27 23:39         ` Jamie Lokier
2003-08-28  0:52           ` Timo Sirainen
2003-08-27 18:42             ` Nagendra Singh Tomar
2003-08-28  8:40               ` Timo Sirainen
2003-08-27 21:15                 ` Nagendra Singh Tomar
2003-08-28  9:35                   ` Timo Sirainen
2003-08-27 21:52                     ` Nagendra Singh Tomar
2003-08-28 13:26                       ` Matthias Andree
2003-08-28  9:17                 ` David Schwartz
2003-08-28  8:42               ` Valdis.Kletnieks
2003-08-28 20:13                 ` David B. Stevens
2003-08-28  1:50             ` Jamie Lokier
2003-08-28  3:17               ` Timo Sirainen
2003-08-28  6:01                 ` Valdis.Kletnieks
2003-08-28  6:13                 ` Jamie Lokier
2003-08-28  8:57                   ` Timo Sirainen
2003-08-28  9:56                     ` David Schwartz
2003-08-28 10:26                       ` Timo Sirainen
2003-08-27 22:58                         ` Nagendra Singh Tomar
2003-08-28 12:18                           ` Jamie Lokier
2003-08-28  0:39                             ` Nagendra Singh Tomar
2003-08-28 13:00                               ` Jamie Lokier
2003-08-28  1:06                                 ` Nagendra Singh Tomar [this message]
2003-08-28 21:49                             ` Bernd Eckenfels
2003-08-28 12:01                         ` Jamie Lokier
2003-08-28 13:28                           ` Timo Sirainen
2003-08-28 20:24                         ` David Schwartz
2003-08-28 12:44                       ` Ragnar Hojland Espinosa
2003-08-28 13:03                         ` Jamie Lokier
2003-08-28 17:26                           ` root
2003-08-28 17:35                             ` Jamie Lokier
2003-08-28 18:10                               ` root
2003-08-28 21:59                             ` Bernd Eckenfels
2003-08-28 23:02                               ` Jamie Lokier
2003-08-28 23:44                               ` Lockless file readingu root
2003-08-29 10:00                                 ` jlnance
2003-08-29 11:55                                   ` David Schwartz
2003-08-29 15:43                                   ` William Lee Irwin III
2003-08-28 20:37                         ` Lockless file reading David Schwartz
2003-08-28 22:11                           ` Bernd Eckenfels
2003-08-28 23:00                             ` Jamie Lokier
2003-08-29  0:47                             ` David Schwartz
2003-08-28  9:13                 ` Martin Konold
2003-08-28  9:27                   ` Timo Sirainen
2003-08-28  9:48                     ` Martin Konold
2003-08-28  0:03       ` Jamie Lokier
2003-08-28 12:08         ` Richard B. Johnson
2003-08-28 12:39           ` Jamie Lokier
2003-08-28 10:08   ` Matthias Andree
2003-08-28 10:54 ` Robin Rosenberg
2003-08-28 12:42   ` Jamie Lokier

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=Pine.LNX.4.44.0308280635260.14580-100000@localhost.localdomain \
    --to=nagendra_tomar@adaptec.com \
    --cc=davids@webmaster.com \
    --cc=jamie@shareable.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=tss@iki.fi \
    /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;
as well as URLs for NNTP newsgroup(s).