GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-07-23 07:12:09 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

Drivers: hv: Eliminate the channel spinlock in the callback path

Browse source 
By ensuring that we set the callback handler to NULL in the channel close
path on the same CPU that the channel is bound to, we can eliminate this lock
acquisition and release in a performance critical path.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
K. Y. Srinivasan 2014-04-08 18:45:53 -07:00 • committed by Greg Kroah-Hartman
parent e4d8270e60
commit d3ba720dd5
4 changed files with 25 additions and 15 deletions
Download patch file Download diff file Expand all files Collapse all files

2
include/linux/hyperv.h
View file

@ -696,6 +696,8 @@ struct vmbus_channel {
* preserve the earlier behavior.
*/
u32 target_vp;
/* The corresponding CPUID in the guest */
u32 target_cpu;
/*
* Support for sub-channels. For high performance devices,
* it will be useful to have multiple sub-channels to support