From: Mel Gorman <mgorman@suse.de>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: David Miller <davem@davemloft.net>,
akpm@linux-foundation.org, linux-mm@kvack.org,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
neilb@suse.de, michaelc@cs.wisc.edu, emunson@mgebm.net
Subject: Re: [PATCH 10/17] netvm: Allow skb allocation to use PFMEMALLOC reserves
Date: Fri, 11 May 2012 16:07:47 +0100 [thread overview]
Message-ID: <20120511150747.GU11435@suse.de> (raw)
In-Reply-To: <1336747350.1017.22.camel@twins>
On Fri, May 11, 2012 at 04:42:30PM +0200, Peter Zijlstra wrote:
> On Fri, 2012-05-11 at 15:32 +0100, Mel Gorman wrote:
> > > > +extern atomic_t memalloc_socks;
> > > > +static inline int sk_memalloc_socks(void)
> > > > +{
> > > > + return atomic_read(&memalloc_socks);
> > > > +}
> > >
> > > Please change this to be a static branch.
> > >
> >
> > Will do. I renamed memalloc_socks to sk_memalloc_socks, made it a int as
> > atomics are unnecessary and I check it directly in a branch instead of a
> > static inline. It should be relatively easy for the branch predictor.
>
> David means you to use include/linux/jump_label.h.
>
Ah, that makes a whole lot more sense. Thanks for the clarification.
--
Mel Gorman
SUSE Labs
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next prev parent reply other threads:[~2012-05-11 15:07 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-10 13:44 [PATCH 00/17] Swap-over-NBD without deadlocking V10 Mel Gorman
2012-05-10 13:44 ` [PATCH 01/17] mm: Serialize access to min_free_kbytes Mel Gorman
2012-05-10 13:44 ` [PATCH 02/17] mm: sl[au]b: Add knowledge of PFMEMALLOC reserve pages Mel Gorman
2012-05-10 13:44 ` [PATCH 03/17] mm: slub: Optimise the SLUB fast path to avoid pfmemalloc checks Mel Gorman
2012-05-10 13:44 ` [PATCH 04/17] mm: Introduce __GFP_MEMALLOC to allow access to emergency reserves Mel Gorman
2012-05-10 13:44 ` [PATCH 05/17] mm: allow PF_MEMALLOC from softirq context Mel Gorman
2012-05-11 4:39 ` David Miller
2012-05-14 10:02 ` Mel Gorman
2012-05-15 13:07 ` Mel Gorman
2012-05-10 13:44 ` [PATCH 06/17] mm: Only set page->pfmemalloc when ALLOC_NO_WATERMARKS was used Mel Gorman
2012-05-10 13:45 ` [PATCH 07/17] mm: Ignore mempolicies when using ALLOC_NO_WATERMARK Mel Gorman
2012-05-10 13:45 ` [PATCH 08/17] net: Introduce sk_allocation() to allow addition of GFP flags depending on the individual socket Mel Gorman
2012-05-11 4:49 ` David Miller
2012-05-11 14:12 ` Mel Gorman
2012-05-10 13:45 ` [PATCH 09/17] netvm: Allow the use of __GFP_MEMALLOC by specific sockets Mel Gorman
2012-05-11 4:50 ` David Miller
2012-05-10 13:45 ` [PATCH 10/17] netvm: Allow skb allocation to use PFMEMALLOC reserves Mel Gorman
2012-05-11 4:57 ` David Miller
2012-05-11 14:32 ` Mel Gorman
2012-05-11 14:42 ` Peter Zijlstra
2012-05-11 15:07 ` Mel Gorman [this message]
2012-05-11 21:17 ` David Miller
2012-05-10 13:45 ` [PATCH 11/17] netvm: Propagate page->pfmemalloc to skb Mel Gorman
2012-05-10 13:45 ` [PATCH 12/17] netvm: Propagate page->pfmemalloc from netdev_alloc_page " Mel Gorman
2012-05-11 5:01 ` David Miller
2012-05-11 14:46 ` Mel Gorman
2012-05-10 13:45 ` [PATCH 13/17] netvm: Set PF_MEMALLOC as appropriate during SKB processing Mel Gorman
2012-05-11 5:03 ` David Miller
2012-05-10 13:45 ` [PATCH 14/17] mm: Micro-optimise slab to avoid a function call Mel Gorman
2012-05-10 13:45 ` [PATCH 15/17] nbd: Set SOCK_MEMALLOC for access to PFMEMALLOC reserves Mel Gorman
2012-05-10 13:45 ` [PATCH 16/17] mm: Throttle direct reclaimers if PF_MEMALLOC reserves are low and swap is backed by network storage Mel Gorman
2012-05-10 13:45 ` [PATCH 17/17] mm: Account for the number of times direct reclaimers get throttled Mel Gorman
2012-05-10 17:17 ` [PATCH 00/17] Swap-over-NBD without deadlocking V10 Mike Christie
2012-05-11 5:04 ` David Miller
2012-05-11 15:45 ` Mel Gorman
2012-05-11 21:23 ` David Miller
2012-05-11 21:29 ` Andrew Morton
2012-05-14 11:10 ` Mel Gorman
-- strict thread matches above, loose matches on Subject: below --
2012-05-17 14:50 [PATCH 00/17] Swap-over-NBD without deadlocking V11 Mel Gorman
2012-05-17 14:50 ` [PATCH 10/17] netvm: Allow skb allocation to use PFMEMALLOC reserves Mel Gorman
2012-05-17 20:12 ` David Miller
2012-06-20 11:43 [PATCH 00/17] Swap-over-NBD without deadlocking V12 (resend) Mel Gorman
2012-06-20 11:44 ` [PATCH 10/17] netvm: Allow skb allocation to use PFMEMALLOC reserves Mel Gorman
2012-06-21 16:09 ` Sebastian Andrzej Siewior
2012-06-22 10:00 ` Mel Gorman
2012-06-21 16:30 ` Sebastian Andrzej Siewior
2012-06-21 16:38 ` Eric Dumazet
2012-06-21 16:43 ` Sebastian Andrzej Siewior
2012-06-22 10:54 ` Mel Gorman
2012-06-22 11:27 ` Sebastian Andrzej Siewior
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