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Re: [PATCH/RFC] fix missing tlb flush on x86 smp+pae

To: Ben LaHaise <bcrl@redhat.com>
Subject: Re: [PATCH/RFC] fix missing tlb flush on x86 smp+pae
From: Jamie Lokier <lk@tantalophile.demon.co.uk>
Date: Fri, 16 Mar 2001 14:12:34 +0100
Cc: torvalds@transmeta.com, linux-mm@kvack.org
In-Reply-To: <Pine.LNX.4.30.0103151438140.16542-100000@today.toronto.redhat.com>; from bcrl@redhat.com on Thu, Mar 15, 2001 at 02:50:50PM -0500
References: <Pine.LNX.4.30.0103151438140.16542-100000@today.toronto.redhat.com>
Sender: owner-linux-mm@kvack.org
User-Agent: Mutt/1.2.5i

Ben LaHaise wrote:
> Below is a patch for 2.4 (it's against 2.4.2-ac20) that fixes a case where
> pmd_alloc could install a new entry without causing a tlb flush on other
> CPUs.  This was fatal with PAE because the CPU caches the top level of the
> page tables, which was showing up as an infinite stream of identical page
> faults.

Ew.  Is this the only case where adding a new entry requires a tlb
flush?  It is quite an unusual requirement.

-- Jamie
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Follow-Ups:
- Re: [PATCH/RFC] fix missing tlb flush on x86 smp+pae
  - From: "Stephen C. Tweedie" <sct@redhat.com>

References:
- [PATCH/RFC] fix missing tlb flush on x86 smp+pae
  - From: Ben LaHaise <bcrl@redhat.com>
- [PATCH/RFC] fix missing tlb flush on x86 smp+pae
  - From: Ben LaHaise <bcrl@redhat.com>

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