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db1c45154a
The spinlock implementation calls the diagnose 0x9c / 0x44 immediately if the SIGP sense running reported the target CPU as not running. The diagnose 0x9c is a hint to the hypervisor to schedule the target CPU in preference to the source CPU that issued the diagnose. It can happen that on return from the diagnose the target CPU has not been scheduled yet, e.g. if the target logical CPU is on another physical CPU and the hypervisor did not want to migrate the logical CPU. Avoid the immediate repeat of the diagnose instruction, instead do the retry loop before the next invocation of diagnose 0x9c. Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> |
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| .. | ||
| delay.c | ||
| find.c | ||
| Makefile | ||
| mem.S | ||
| probes.c | ||
| spinlock.c | ||
| string.c | ||
| uaccess.c | ||