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authorMel Gorman <mgorman@suse.de>2012-08-01 01:44:26 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2012-08-01 03:42:46 +0200
commitb4b9e3558508980fc0cd161a545ffb55a1f13ee9 (patch)
treeabb2ab54f4b201b1cbdaf181ec16912c3dd889eb /net/ax25/sysctl_net_ax25.c
parentnetvm: propagate page->pfmemalloc from skb_alloc_page to skb (diff)
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netvm: set PF_MEMALLOC as appropriate during SKB processing
In order to make sure pfmemalloc packets receive all memory needed to proceed, ensure processing of pfmemalloc SKBs happens under PF_MEMALLOC. This is limited to a subset of protocols that are expected to be used for writing to swap. Taps are not allowed to use PF_MEMALLOC as these are expected to communicate with userspace processes which could be paged out. [a.p.zijlstra@chello.nl: Ideas taken from various patches] [jslaby@suse.cz: Lock imbalance fix] Signed-off-by: Mel Gorman <mgorman@suse.de> Acked-by: David S. Miller <davem@davemloft.net> Cc: Neil Brown <neilb@suse.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Christie <michaelc@cs.wisc.edu> Cc: Eric B Munson <emunson@mgebm.net> Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: Sebastian Andrzej Siewior <sebastian@breakpoint.cc> Cc: Mel Gorman <mgorman@suse.de> Cc: Christoph Lameter <cl@linux.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'net/ax25/sysctl_net_ax25.c')
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