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authorMel Gorman <mgorman@suse.de>2012-07-31 16:44:16 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-07-31 18:42:46 -0700
commit7cb0240492caea2f6467f827313478f41877e6ef (patch)
tree4836f7c2c07ed199e3122ea70bedf34f048ecd81 /net/sunrpc
parent99a1dec70d5acbd8c6b3928cdebb4a2d1da676c8 (diff)
netvm: allow the use of __GFP_MEMALLOC by specific sockets
Allow specific sockets to be tagged SOCK_MEMALLOC and use __GFP_MEMALLOC for their allocations. These sockets will be able to go below watermarks and allocate from the emergency reserve. Such sockets are to be used to service the VM (iow. to swap over). They must be handled kernel side, exposing such a socket to user-space is a bug. There is a risk that the reserves be depleted so for now, the administrator is responsible for increasing min_free_kbytes as necessary to prevent deadlock for their workloads. [a.p.zijlstra@chello.nl: Original patches] 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/sunrpc')
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