From: Robert Love <rml@tech9.net>
To: Antonio Vargas <wind@cocodriloo.com>
Cc: William Lee Irwin III <wli@holomorphy.com>, linux-kernel@vger.kernel.org
Subject: Re: fairsched + O(1) process scheduler
Date: 02 Apr 2003 17:10:27 -0500 [thread overview]
Message-ID: <1049321427.2872.25.camel@localhost> (raw)
In-Reply-To: <20030402220734.GC13168@wind.cocodriloo.com>
On Wed, 2003-04-02 at 17:07, Antonio Vargas wrote:
> Hmmm, we had some way for executing code just after an interrupt,
> but outside interrupt scope... was it a bottom half? Can you
> point me to some place where it's done?
Unfortunately uidhash_lock cannot be used from a bottom half either.
You can push it into a work queue. See schedule_work() and the default
events queue.
> Ok, I did know m68k can do it, but wasn't sure about all other arches :)
Yep. Everyone architecture I know of - and certainly all that Linux
support - can do atomic read/writes to a word. Thinking about it, it
would be odd if not (two writes to a single word interleaving?). There
are places this assumption is used.
Anything more complicated, of course, needs atomic operations or locks.
Robert Love
next prev parent reply other threads:[~2003-04-02 21:58 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-04-01 12:51 fairsched + O(1) process scheduler Antonio Vargas
2003-04-01 16:41 ` William Lee Irwin III
2003-04-01 22:19 ` Antonio Vargas
2003-04-02 12:46 ` Antonio Vargas
2003-04-02 16:35 ` William Lee Irwin III
2003-04-02 21:36 ` Antonio Vargas
2003-04-02 21:35 ` Robert Love
2003-04-02 22:07 ` Antonio Vargas
2003-04-02 22:10 ` Robert Love [this message]
2003-04-02 22:35 ` Antonio Vargas
2003-04-03 17:15 ` Corey Minyard
2003-04-03 18:17 ` Robert Love
[not found] ` <200304021144.21924.frankeh@watson.ibm.com>
2003-04-03 12:53 ` Antonio Vargas
2003-04-03 19:22 ` William Lee Irwin III
2003-04-04 11:27 ` Antonio Vargas
2003-04-04 14:04 ` William Lee Irwin III
2003-04-04 20:12 ` Antonio Vargas
2003-04-04 20:40 ` William Lee Irwin III
[not found] ` <200304041453.16630.frankeh@watson.ibm.com>
2003-04-04 21:36 ` Antonio Vargas
[not found] ` <200304081456.34367.frankeh@watson.ibm.com>
2003-04-08 20:19 ` Antonio Vargas
2003-04-01 18:33 ` Robert Love
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=1049321427.2872.25.camel@localhost \
--to=rml@tech9.net \
--cc=linux-kernel@vger.kernel.org \
--cc=wind@cocodriloo.com \
--cc=wli@holomorphy.com \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.