kernel_optimize_test/include
Rusty Russell 7b21e34fd1 virtio: harsher barriers for rpmsg.
We were cheating with our barriers; using the smp ones rather than the
real device ones.  That was fine, until rpmsg came along, which is
used to talk to a real device (a non-SMP CPU).

Unfortunately, just putting back the real barriers (reverting
d57ed95d) causes a performance regression on virtio-pci.  In
particular, Amos reports netbench's TCP_RR over virtio_net CPU
utilization increased up to 35% while throughput went down by up to
14%.

By comparison, this branch is in the noise.

Reference: https://lkml.org/lkml/2011/12/11/22

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2012-01-12 15:44:42 +10:30
..
acpi
asm-generic lib: use generic pci_iomap on all architectures 2012-01-10 18:04:27 -08:00
crypto
drm Merge branch 'drm-core-next' of git://people.freedesktop.org/~airlied/linux 2012-01-10 11:04:36 -08:00
keys
linux virtio: harsher barriers for rpmsg. 2012-01-12 15:44:42 +10:30
math-emu
media
misc
mtd mtd: document that MEMWRITE ioctl is NAND-specific 2012-01-09 18:18:36 +00:00
net Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs 2012-01-10 15:09:01 -08:00
pcmcia
rdma
rxrpc
scsi SCSI updates for post 3.2 merge window 2012-01-10 10:36:08 -08:00
sound Driver specific changes 2012-01-09 14:39:22 -08:00
target
trace Merge branch 'writeback-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux 2012-01-10 16:59:59 -08:00
video
xen Merge branch 'stable/for-linus-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen 2012-01-10 10:09:59 -08:00
Kbuild