From: Nathan Lynch <ntl@pobox.com>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: linuxppc-dev@ozlabs.org, Paul Mackerras <paulus@samba.org>,
Anton Blanchard <anton@samba.org>
Subject: Re: [PATCH] fix gettimeofday vs. update_gtod race
Date: Mon, 21 Aug 2006 16:25:55 -0500 [thread overview]
Message-ID: <20060821212555.GC9828@localdomain> (raw)
In-Reply-To: <20060817204712.GD354@localdomain>
Nathan Lynch wrote:
> Benjamin Herrenschmidt wrote:
> > On Wed, 2006-08-16 at 19:18 -0500, Nathan Lynch wrote:
> >
> > > No? I didn't find anything about mftb having synchronizing
> > > behavior. How should we ensure that temp_varp is assigned before
> > > reading the timebase?
> >
> > I sync an isync would be enough.
>
> I see, thanks.
Actually, after checking Book 2 and discussing with some other folks
I'm not so sure -- isync "may complete before storage accesses
associated with instructions preceding the isync instruction have been
performed."
next prev parent reply other threads:[~2006-08-21 21:26 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-11 20:41 [PATCH] fix gettimeofday vs. update_gtod race Nathan Lynch
2006-08-16 23:48 ` Benjamin Herrenschmidt
2006-08-17 0:18 ` Nathan Lynch
2006-08-17 0:27 ` Benjamin Herrenschmidt
2006-08-17 20:47 ` Nathan Lynch
2006-08-21 21:25 ` Nathan Lynch [this message]
2006-08-21 21:43 ` Benjamin Herrenschmidt
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=20060821212555.GC9828@localdomain \
--to=ntl@pobox.com \
--cc=anton@samba.org \
--cc=benh@kernel.crashing.org \
--cc=linuxppc-dev@ozlabs.org \
--cc=paulus@samba.org \
/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).