dlan17/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

powerpc: Simplify pSeries idle loop

Browse Source 
Since pSeries only wants to do something different in the idle loop when
there is no work to do, we can simplify the code by implementing
ppc_md.power_save functions instead of complete idle loops.  There are
two versions: one for shared-processor partitions and one for dedicated-
processor partitions.

With this we also do a cede_processor() call on dedicated processor
partitions if the poll_pending() call indicates that the hypervisor
has work it wants to do.

Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Paul Mackerras
2006-03-27 15:06:20 +11:00
parent a0652fc9a2
commit fbd7740fdf
2 changed files with 69 additions and 118 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/asm-powerpc/hvcall.h
+1
View File
@@ -9,6 +9,7 @@
#define H_Closed 2 /* Resource closed */
#define H_Constrained 4 /* Resource request constrained to max allowed */
#define H_InProgress 14 /* Kind of like busy */
#define H_Pending 17 /* returned from H_POLL_PENDING */
#define H_Continue 18 /* Returned from H_Join on success */
#define H_LongBusyStartRange 9900 /* Start of long busy range */
#define H_LongBusyOrder1msec 9900 /* Long busy, hint that 1msec is a good time to retry */