From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Martin K. Petersen" Date: Wed, 13 Oct 2004 19:32:43 +0000 Subject: Re: [RFC] Convert pgtable cache to slab Message-Id: List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-ia64@vger.kernel.org >>>>> "Tony" = Luck, Tony writes: Tony, Tony> What was the benchmark you were running when you measured these? I'm going to let Robin send you his test case. Tony> How does this scale on big sn2 systems? I assume that the Tony> answers are going to be just fine as the slab allocator per-cpu Tony> lists should be just as nice as local quicklists, but it would Tony> be nice to see some data. The tests above are from a 64-way Altix. I'm still looking into the issue of freed data ending up in other nodes' slabs. Don't know if anybody else have been working on this? >> The biggest caveat is that I've had to postpone setting up the gate >> page until the pgt slab has been initialized. That wasn't an issue >> with the existing page-based allocation scheme. David - how do you >> prefer I handle this? Tony> I don't see the code for this postponement in this patch. It's there. End of the mm/init.c hunk. Tony> Perhaps "zero_cache" isn't as descriptive a name as it might be Tony> (not that I have any better suggestions :-( Yeah, this is what Bill called it on ppc64. pgtable_cache perhaps? -- Martin K. Petersen Wild Open Source, Inc. mkp@wildopensource.com http://www.wildopensource.com/