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	vhost: allow vhost-scsi driver to be built-in	2018-08-22 01:01:32 +03:00
Kconfig.vringh	vhost: split out vringh Kconfig	2016-08-02 16:54:28 +03:00
Makefile	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
net.c	vhost_net: mitigate page reference counting during page frag refill	2018-11-17 12:00:42 -08:00
scsi.c	vhost/scsi: Use common handling code in request queue handler	2018-10-24 21:16:13 -04:00
test.c	treewide: kmalloc() -> kmalloc_array()	2018-06-12 16:19:22 -07:00
test.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
vhost.c	vhost: Fix Spectre V1 vulnerability	2018-10-31 12:39:15 -07:00
vhost.h	vhost: switch to use new message format	2018-08-06 10:41:04 -07:00
vringh.c	treewide: kmalloc() -> kmalloc_array()	2018-06-12 16:19:22 -07:00
vsock.c	fw_cfg, vhost: features fixes	2018-04-06 19:21:41 -07:00