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| author |   QingFeng Hao <haoqf@linux.vnet.ibm.com> | 2017-09-29 12:41:51 +0200 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2017-10-09 11:15:35 +0200 |
| commit | 9fb6c9b3fea1b1d1c6f14178373e8f7235f3b681 (patch) | |
| tree | 9b530f5034bad26c87adf9b17919d01438e20e18 /arch/s390/include/asm/kvm_host.h | |
| parent | s390/sthyi: reorganize sthyi implementation (diff) | |
| download | linux-dev-9fb6c9b3fea1b1d1c6f14178373e8f7235f3b681.tar.xz linux-dev-9fb6c9b3fea1b1d1c6f14178373e8f7235f3b681.zip | |
s390/sthyi: add cache to store hypervisor info
STHYI requires extensive locking in the higher hypervisors and is
very computational/memory expensive. Therefore we cache the retrieved
hypervisor info whose valid period is 1s with mutex to allow concurrent
access. rw semaphore can't benefit here due to cache line bounce.
Signed-off-by: QingFeng Hao <haoqf@linux.vnet.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/kvm_host.h')
| -rw-r--r-- | arch/s390/include/asm/kvm_host.h | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h index 51375e766e90..fd006a272024 100644 --- a/arch/s390/include/asm/kvm_host.h +++ b/arch/s390/include/asm/kvm_host.h @@ -736,7 +736,6 @@ struct kvm_arch{ wait_queue_head_t ipte_wq; int ipte_lock_count; struct mutex ipte_mutex; - struct ratelimit_state sthyi_limit; spinlock_t start_stop_lock; struct sie_page2 *sie_page2; struct kvm_s390_cpu_model model; |