From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nick Piggin Subject: Re: [PATCH 09/33] mm: system wide ALLOC_NO_WATERMARK Date: Wed, 31 Oct 2007 14:52:35 +1100 References: <20071030160401.296770000@chello.nl> <20071030160912.283002000@chello.nl> In-Reply-To: <20071030160912.283002000@chello.nl> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200710311452.36239.nickpiggin@yahoo.com.au> Sender: owner-linux-mm@kvack.org Return-Path: To: Peter Zijlstra Cc: Linus Torvalds , Andrew Morton , linux-kernel@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org, trond.myklebust@fys.uio.no List-ID: On Wednesday 31 October 2007 03:04, Peter Zijlstra wrote: > Change ALLOC_NO_WATERMARK page allocation such that the reserves are system > wide - which they are per setup_per_zone_pages_min(), when we scrape the > barrel, do it properly. > IIRC it's actually not too uncommon to have allocations coming here via page reclaim. It's not exactly clear that you want to break mempolicies at this point. > Signed-off-by: Peter Zijlstra > --- > mm/page_alloc.c | 6 ++++++ > 1 file changed, 6 insertions(+) > > Index: linux-2.6/mm/page_alloc.c > =================================================================== > --- linux-2.6.orig/mm/page_alloc.c > +++ linux-2.6/mm/page_alloc.c > @@ -1638,6 +1638,12 @@ restart: > rebalance: > if (alloc_flags & ALLOC_NO_WATERMARKS) { > nofail_alloc: > + /* > + * break out of mempolicy boundaries > + */ > + zonelist = NODE_DATA(numa_node_id())->node_zonelists + > + gfp_zone(gfp_mask); > + > /* go through the zonelist yet again, ignoring mins */ > page = get_page_from_freelist(gfp_mask, order, zonelist, > ALLOC_NO_WATERMARKS); > > -- > > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org