From: Jens Axboe <jens.axboe@oracle.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>,
jeremy.fitzhardinge@citrix.com, nickpiggin@yahoo.com.au,
torvalds@linux-foundation.org, paulmck@linux.vnet.ibm.com,
linux-kernel@vger.kernel.org, venkatesh.pallipadi@intel.com
Subject: Re: [patch 2/3] x86: Add smp_mb() before sending INVALIDATE_TLB_VECTOR
Date: Thu, 6 Nov 2008 09:43:31 +0100 [thread overview]
Message-ID: <20081106084331.GY21867@kernel.dk> (raw)
In-Reply-To: <20081106084211.GA4890@elte.hu>
On Thu, Nov 06 2008, Ingo Molnar wrote:
>
> * Suresh Siddha <suresh.b.siddha@intel.com> wrote:
>
> > On x86, x2apic mode accesses for sending IPI's don't have
> > serializing semantics. If the IPI receiver refers(in lock-free
> > fashion) to some memory setup by the sender, the need for smp_mb()
> > before sending the IPI becomes critical in x2apic mode.
> >
> > Add the smp_mb() in native_flush_tlb_others() before sending the
> > IPI.
> >
> > Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
>
> applied to tip/x86/urgent, thanks Suresh!
>
> Jens, you'll send 1/3 and 3/3 to Linus, right?
Yes, it's in for-linus and I'll send the pull request today.
--
Jens Axboe
next prev parent reply other threads:[~2008-11-06 8:45 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-04 21:53 [patch 1/3] generic-ipi: add smp_mb() before sending the IPI Suresh Siddha
2008-11-04 21:53 ` [patch 2/3] x86: Add smp_mb() before sending INVALIDATE_TLB_VECTOR Suresh Siddha
2008-11-06 8:42 ` Ingo Molnar
2008-11-06 8:43 ` Jens Axboe [this message]
2008-11-04 21:53 ` [patch 3/3] generic-ipi: fix the smp_mb() usage Suresh Siddha
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=20081106084331.GY21867@kernel.dk \
--to=jens.axboe@oracle.com \
--cc=jeremy.fitzhardinge@citrix.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@elte.hu \
--cc=nickpiggin@yahoo.com.au \
--cc=paulmck@linux.vnet.ibm.com \
--cc=suresh.b.siddha@intel.com \
--cc=torvalds@linux-foundation.org \
--cc=venkatesh.pallipadi@intel.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.