From: Jun Sun <jsun@mvista.com>
To: Florian Lohoff <flo@rfc822.org>
Cc: linux-mips@oss.sgi.com
Subject: Re: userspace spinlocks
Date: Mon, 30 Oct 2000 09:51:06 -0800 [thread overview]
Message-ID: <39FDB50A.4919D84E@mvista.com> (raw)
In-Reply-To: 20001030151736.C2687@paradigm.rfc822.org
Florian Lohoff wrote:
>
> OTOH - Where are they normally implemented ? libc ? macro ?
As far I know, they ether use atomic instructions such as ll/sc or use
kernel trap to emulate atomic operations. I am not sure if other means
are possible because userland cannot disable interrupts or prevent
context switch.
> Could
> there be a runtime linking thing with a cpu detection wether we
> have ll/sc or not ?
>
This is a wonderful idea. It should incorporate into future MIPS CPU
support structure.
Jun
next prev parent reply other threads:[~2000-10-30 17:50 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-10-30 14:17 userspace spinlocks Florian Lohoff
2000-10-30 17:51 ` Jun Sun [this message]
2000-10-31 20:14 ` Ralf Baechle
2000-10-31 22:01 ` Jun Sun
2000-11-01 6:50 ` Mike Klar
2000-11-01 6:50 ` Mike Klar
2000-11-01 13:36 ` Ralf Baechle
2000-11-01 16:40 ` Mike Klar
2000-11-01 16:40 ` Mike Klar
2000-11-01 9:09 ` Florian Lohoff
2000-10-31 18:22 ` Ralf Baechle
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=39FDB50A.4919D84E@mvista.com \
--to=jsun@mvista.com \
--cc=flo@rfc822.org \
--cc=linux-mips@oss.sgi.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.