linux-kernel - Re: question about pt locking

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Message-ID: <20090320092421.GA7195@shentino-desktop>
Date:	Fri, 20 Mar 2009 02:24:21 -0700
From:	Shentino <shentino@...il.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Shentino <shentino@...il.com>, linux-kernel@...r.kernel.org
Subject: Re: question about pt locking

On Fri, Mar 20, 2009 at 09:52:10AM +0100, Peter Zijlstra wrote:
> On Fri, 2009-03-20 at 01:16 -0700, Shentino wrote:
> > Just curious, but does a process effectively have a read-lock on its 
> > page tables when it's in userland?
> 
> No, page reclaim can fiddle with a running process' page tables
> concurrently.

Yeah just now remembered why the kernel has tlb inval/flush routines

...duh...

Thanks for the answers though, I learned something today.
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