Jason Wang e4dab1e6ea vhost_net: mitigate page reference counting during page frag refill ... We do a get_page() which involves a atomic operation. This patch tries to mitigate a per packet atomic operation by maintaining a reference bias which is initially USHRT_MAX. Each time a page is got, instead of calling get_page() we decrease the bias and when we find it's time to use a new page we will decrease the bias at one time through __page_cache_drain_cache(). Testpmd(virtio_user + vhost_net) + XDP_DROP on TAP shows about 1.6% improvement. Before: 4.63Mpps After: 4.71Mpps Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2018-11-17 12:00:42 -08:00
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Kconfig
Kconfig.vringh
Makefile
net.c	vhost_net: mitigate page reference counting during page frag refill	2018-11-17 12:00:42 -08:00
scsi.c
test.c
test.h
vhost.c	vhost: Fix Spectre V1 vulnerability	2018-10-31 12:39:15 -07:00
vhost.h
vringh.c
vsock.c