linux-kernel - Re: [PATCH] Avoid double flush in do_tlb_flush

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Message-ID: <20080830090158.072d40b3@infradead.org>
Date:	Sat, 30 Aug 2008 09:01:58 -0700
From:	Arjan van de Ven <arjan@...radead.org>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	x86@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Avoid double flush in do_tlb_flush_all()

On Sat, 30 Aug 2008 12:20:12 +0200
Andi Kleen <andi@...stfloor.org> wrote:

> Avoid double flush in do_tlb_flush_all()
> 
> leave_mm already flushes the TLBs, so don't need to flush directly
> before that in do_flush_tlb_all(). Avoid the double flush.

but... the leave_mm won't flush the global tlbs, while
__flush_tlb_all() does, right?

sounds like we do need the behavior
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