From: "Stephen C. Tweedie" <sct@redhat.com>
To: masp0008@stud.uni-sb.de
Cc: linux-kernel@vger.rutgers.edu, linux-mm@kvack.org,
"David S. Miller" <davem@dm.cobaltmicro.com>,
Stephen Tweedie <sct@redhat.com>
Subject: Re: kernel_lock() profiling results
Date: Wed, 26 May 1999 17:34:38 +0100 (BST) [thread overview]
Message-ID: <14156.8862.155397.630098@dukat.scot.redhat.com> (raw)
In-Reply-To: <3748111C.3F040C1F@colorfullife.com>
Hi,
On Sun, 23 May 1999 16:30:52 +0200, Manfred Spraul
<manfreds@colorfullife.com> said:
> Shouldn't we change file_read_actor() [mm/filemap.c, the function which
> copies data from the page cache to user mode]:
> we could release the kernel lock if we copy more than 1024 bytes.
> (we currently do that only if the user mode memory is not paged in.)
ftp://ftp.uk.linux.org/pub/linux/sct/performance
contains a patch Dave Miller and I put together to drop the kernel lock
during a number of key user mode copies.
--Stephen
--
To unsubscribe, send a message with 'unsubscribe linux-mm my@address'
in the body to majordomo@kvack.org. For more info on Linux MM,
see: http://humbolt.geo.uu.nl/Linux-MM/
next prev parent reply other threads:[~1999-05-26 16:34 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
1999-05-23 14:30 Manfred Spraul
1999-05-26 16:34 ` Stephen C. Tweedie [this message]
1999-05-26 17:41 ` Manfred Spraul
1999-05-26 19:22 ` Stephen C. Tweedie
1999-05-29 0:45 ` Andrea Arcangeli
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=14156.8862.155397.630098@dukat.scot.redhat.com \
--to=sct@redhat.com \
--cc=davem@dm.cobaltmicro.com \
--cc=linux-kernel@vger.rutgers.edu \
--cc=linux-mm@kvack.org \
--cc=masp0008@stud.uni-sb.de \
/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