From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nick Piggin Date: Fri, 10 Dec 2004 05:19:56 +0000 Subject: Re: page fault scalability patch V12 [0/7]: Overview and performance Message-Id: <41B931FC.8040109@yahoo.com.au> List-Id: References: <41B92567.8070809@yahoo.com.au> <41B92C11.80106@yahoo.com.au> <1102655177.22746.29.camel@gaston> In-Reply-To: <1102655177.22746.29.camel@gaston> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Benjamin Herrenschmidt Cc: Hugh Dickins , Christoph Lameter , Linus Torvalds , Andrew Morton , linux-mm@kvack.org, linux-ia64@vger.kernel.org, Linux Kernel list Benjamin Herrenschmidt wrote: > On Fri, 2004-12-10 at 15:54 +1100, Nick Piggin wrote: > >>Nick Piggin wrote: >> >>The page-freed-before-update_mmu_cache issue can be solved in that way, >>not the set_pte and update_mmu_cache not performed under the same ptl >>section issue that you raised. > > > What is the problem with update_mmu_cache ? It doesn't need to be done > in the same lock section since it's approx. equivalent to a HW fault, > which doesn't take the ptl... > I don't think a problem has been observed, I think Hugh was just raising it as a general issue.