From: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>,
Mel Gorman <mgorman@suse.de>,
Andrew Morton <akpm@linux-foundation.org>,
Linux-MM <linux-mm@kvack.org>,
Linux-Netdev <netdev@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
David Miller <davem@davemloft.net>, Neil Brown <neilb@suse.de>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Mike Christie <michaelc@cs.wisc.edu>,
Eric B Munson <emunson@mgebm.net>
Subject: Re: [PATCH 10/17] netvm: Allow skb allocation to use PFMEMALLOC reserves
Date: Thu, 21 Jun 2012 18:43:29 +0200 [thread overview]
Message-ID: <20120621164329.GA6195@breakpoint.cc> (raw)
In-Reply-To: <1340296719.4604.5984.camel@edumazet-glaptop>
> > This is mostly used by nic to refil their RX skb pool. You add the
> > __GFP_MEMALLOC to the allocation to rise the change of a successfull refill
> > for the swap case.
> > A few drivers use build_skb() to create the skb. __netdev_alloc_skb()
> > shouldn't be affected since the allocation happens with GFP_ATOMIC. Looking at
> > TG3 it uses build_skb() and get_pages() / kmalloc(). Shouldn't this be some
> > considered?
>
> Please look at net-next, this was changed recently.
>
> In fact most RX allocations are done using netdev_alloc_frag(), because
> its called from __netdev_alloc_skb()
Argh, this is what I meant more or less. I got the flag magic wrong so I assumed
that this is only called without GFP_ATOMIC but it is not. Thanks for the
hint.
> So tg3 is not anymore the exception, but the norm.
Sebastian
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next prev parent reply other threads:[~2012-06-21 16:43 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-20 11:43 [PATCH 00/17] Swap-over-NBD without deadlocking V12 (resend) Mel Gorman
2012-06-20 11:43 ` [PATCH 01/17] mm: sl[au]b: Add knowledge of PFMEMALLOC reserve pages Mel Gorman
2012-06-21 21:30 ` Rik van Riel
2012-06-22 9:34 ` Mel Gorman
2012-06-20 11:43 ` [PATCH 02/17] mm: slub: Optimise the SLUB fast path to avoid pfmemalloc checks Mel Gorman
2012-06-20 11:43 ` [PATCH 03/17] mm: Introduce __GFP_MEMALLOC to allow access to emergency reserves Mel Gorman
2012-06-20 11:43 ` [PATCH 04/17] mm: allow PF_MEMALLOC from softirq context Mel Gorman
2012-06-20 11:44 ` [PATCH 05/17] mm: Only set page->pfmemalloc when ALLOC_NO_WATERMARKS was used Mel Gorman
2012-06-20 11:44 ` [PATCH 06/17] mm: Ignore mempolicies when using ALLOC_NO_WATERMARK Mel Gorman
2012-06-20 11:44 ` [PATCH 07/17] net: Introduce sk_gfp_atomic() to allow addition of GFP flags depending on the individual socket Mel Gorman
2012-06-20 12:06 ` Eric Dumazet
2012-06-20 14:20 ` Mel Gorman
2012-06-20 11:44 ` [PATCH 08/17] net: Do not coalesce skbs belonging to PFMEMALLOC sockets Mel Gorman
2012-06-20 12:04 ` Eric Dumazet
2012-06-20 13:36 ` Mel Gorman
2012-06-20 13:51 ` Eric Dumazet
2012-06-20 14:18 ` Mel Gorman
2012-06-20 11:44 ` [PATCH 09/17] netvm: Allow the use of __GFP_MEMALLOC by specific sockets 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 [this message]
2012-06-22 10:54 ` Mel Gorman
2012-06-22 11:27 ` Sebastian Andrzej Siewior
2012-06-20 11:44 ` [PATCH 11/17] netvm: Propagate page->pfmemalloc to skb Mel Gorman
2012-06-20 11:44 ` [PATCH 12/17] netvm: Propagate page->pfmemalloc from skb_alloc_page " Mel Gorman
2012-06-20 11:44 ` [PATCH 13/17] netvm: Set PF_MEMALLOC as appropriate during SKB processing Mel Gorman
2012-06-20 11:44 ` [PATCH 14/17] mm: Micro-optimise slab to avoid a function call Mel Gorman
2012-06-20 11:44 ` [PATCH 15/17] nbd: Set SOCK_MEMALLOC for access to PFMEMALLOC reserves Mel Gorman
2012-06-20 11:44 ` [PATCH 16/17] mm: Throttle direct reclaimers if PF_MEMALLOC reserves are low and swap is backed by network storage Mel Gorman
2012-06-20 11:44 ` [PATCH 17/17] mm: Account for the number of times direct reclaimers get throttled 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
2012-05-10 13:44 [PATCH 00/17] Swap-over-NBD without deadlocking V10 Mel Gorman
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
2012-05-11 21:17 ` David Miller
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