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| author | Li RongQing <[email protected]> | 2024-07-11 12:11:30 +0000 |
|---|---|---|
| committer | Paolo Bonzini <[email protected]> | 2024-08-13 16:09:35 +0000 |
| commit | c9b35a6f4edea698a5bb4dd8029e7104ee0a3726 (patch) | |
| tree | d02be924bf3e7c4ac041b03a4abbe181bbdba450 /drivers/platform/surface/aggregator/ssh_parser.c | |
| parent | KVM: selftests: Add a testcase to verify x2APIC is fully readonly (diff) | |
| download | kernel-c9b35a6f4edea698a5bb4dd8029e7104ee0a3726.tar.gz kernel-c9b35a6f4edea698a5bb4dd8029e7104ee0a3726.zip | |
KVM: eventfd: Use synchronize_srcu_expedited() on shutdown
When hot-unplug a device which has many queues, and guest CPU will has
huge jitter, and unplugging is very slow.
It turns out synchronize_srcu() in irqfd_shutdown() caused the guest
jitter and unplugging latency, so replace synchronize_srcu() with
synchronize_srcu_expedited(), to accelerate the unplugging, and reduce
the guest OS jitter, this accelerates the VM reboot too.
Signed-off-by: Li RongQing <[email protected]>
Message-ID: <[email protected]>
[Call it just once in irqfd_resampler_shutdown. - Paolo]
Signed-off-by: Paolo Bonzini <[email protected]>
Diffstat (limited to 'drivers/platform/surface/aggregator/ssh_parser.c')
0 files changed, 0 insertions, 0 deletions