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From: Ingo Molnar <>
To: Suresh Siddha <>
Subject: Re: [patch 2/3] x86: Add smp_mb() before sending INVALIDATE_TLB_VECTOR
Date: Thu, 6 Nov 2008 09:42:11 +0100	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

* Suresh Siddha <> 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 <>

applied to tip/x86/urgent, thanks Suresh!

Jens, you'll send 1/3 and 3/3 to Linus, right?


  reply	other threads:[~2008-11-06  8:42 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 [this message]
2008-11-06  8:43     ` Jens Axboe
2008-11-04 21:53 ` [patch 3/3] generic-ipi: fix the smp_mb() usage Suresh Siddha

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