virtio: Do not drop __GFP_HIGH in alloc_indirect
authorMichal Hocko <mhocko@suse.com>
Tue, 1 Dec 2015 14:32:49 +0000 (15:32 +0100)
committerMichael S. Tsirkin <mst@redhat.com>
Mon, 7 Dec 2015 15:28:11 +0000 (17:28 +0200)
commit82107539bbb9db303fb6676c78c836add5680bb0
tree8e3a313983e66ac7bc8ff5bab6924a740f8af8ac
parent5fba13b5cf5856e725de35665c37b647323d3b9a
virtio: Do not drop __GFP_HIGH in alloc_indirect

b92b1b89a33c ("virtio: force vring descriptors to be allocated from
lowmem") tried to exclude highmem pages for descriptors so it cleared
__GFP_HIGHMEM from a given gfp mask. The patch also cleared __GFP_HIGH
which doesn't make much sense for this fix because __GFP_HIGH only
controls access to memory reserves and it doesn't have any influence
on the zone selection. Some of the call paths use GFP_ATOMIC and
dropping __GFP_HIGH will reduce their changes for success because the
lack of access to memory reserves.

Signed-off-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Reviewed-by: Mel Gorman <mgorman@techsingularity.net>
drivers/virtio/virtio_ring.c