From: Daniel Jacobowitz <dan@debian.org>
To: David Daney <ddaney@avtrex.com>
Cc: Richard Sandiford <rsandifo@nildram.co.uk>,
GCC Mailing List <gcc@gcc.gnu.org>,
linux-mips@linux-mips.org
Subject: Re: MIPS atomic memory operations (A.K.A PR 33479).
Date: Tue, 18 Sep 2007 22:32:35 -0400 [thread overview]
Message-ID: <20070919023235.GA31042@caradoc.them.org> (raw)
In-Reply-To: <46F06980.4080500@avtrex.com>
On Tue, Sep 18, 2007 at 05:12:48PM -0700, David Daney wrote:
> I guess my basic question is: Should MIPS_COMPARE_AND_SWAP have a 'sync' after
> the 'sc'? I would have thought that 'sc' made the write visible to all CPUs,
> but on the SB1 it appears not to be the case.
Yes, a barrier of some sort is definitely necessary. I believe the
SB1 is weakly ordered, and the architecture spec permits both strong
and weak ordering; but it's been a while since I tried this.
--
Daniel Jacobowitz
CodeSourcery
next prev parent reply other threads:[~2007-09-19 2:33 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-19 0:12 MIPS atomic memory operations (A.K.A PR 33479) David Daney
2007-09-19 2:32 ` Daniel Jacobowitz [this message]
2007-09-19 8:45 ` Thiemo Seufer
2007-09-19 16:58 ` Ralf Baechle
2007-09-19 17:07 ` Maciej W. Rozycki
2007-09-19 17:26 ` David Daney
2007-09-19 17:46 ` Maciej W. Rozycki
2007-09-19 17:49 ` David Daney
2007-09-19 18:12 ` Thiemo Seufer
2007-09-19 18:28 ` Ralf Baechle
2007-09-19 17:47 ` David Daney
2007-09-19 18:08 ` Maciej W. Rozycki
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=20070919023235.GA31042@caradoc.them.org \
--to=dan@debian.org \
--cc=ddaney@avtrex.com \
--cc=gcc@gcc.gnu.org \
--cc=linux-mips@linux-mips.org \
--cc=rsandifo@nildram.co.uk \
/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.