From: David Rientjes <rientjes@google.com>
To: Suresh Jayaraman <sjayaraman@suse.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
netdev@vger.kernel.org, Neil Brown <neilb@suse.de>,
Miklos Szeredi <mszeredi@suse.cz>, Wouter Verhelst <w@uter.be>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
trond.myklebust@fys.uio.no
Subject: Re: [PATCH 04/31] mm: tag reseve pages
Date: Thu, 1 Oct 2009 14:09:54 -0700 (PDT) [thread overview]
Message-ID: <alpine.DEB.1.00.0910011407390.32006@chino.kir.corp.google.com> (raw)
In-Reply-To: <1254405917-15796-1-git-send-email-sjayaraman@suse.de>
On Thu, 1 Oct 2009, Suresh Jayaraman wrote:
> Index: mmotm/mm/page_alloc.c
> ===================================================================
> --- mmotm.orig/mm/page_alloc.c
> +++ mmotm/mm/page_alloc.c
> @@ -1501,8 +1501,10 @@ zonelist_scan:
> try_this_zone:
> page = buffered_rmqueue(preferred_zone, zone, order,
> gfp_mask, migratetype);
> - if (page)
> + if (page) {
> + page->reserve = !!(alloc_flags & ALLOC_NO_WATERMARKS);
> break;
> + }
> this_zone_full:
> if (NUMA_BUILD)
> zlc_mark_zone_full(zonelist, z);
page->reserve won't necessary indicate that access to reserves was
_necessary_ for the allocation to succeed, though. This will mark any
page being allocated under PF_MEMALLOC as reserve when all zones may be
well above their min watermarks.
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next prev parent reply other threads:[~2009-10-01 21:09 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-01 14:05 Suresh Jayaraman
2009-10-01 21:09 ` David Rientjes [this message]
2009-10-02 4:43 ` Neil Brown
2009-10-02 9:50 ` David Rientjes
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