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[Qemu-devel] [PATCH 04/23] Trigger exit from cpu_exec_all on pending IO
From: |
Marcelo Tosatti |
Subject: |
[Qemu-devel] [PATCH 04/23] Trigger exit from cpu_exec_all on pending IO events |
Date: |
Fri, 4 Feb 2011 13:47:07 -0200 |
From: Jan Kiszka <address@hidden>
Except for timer events, we currently do not leave the loop over all
VCPUs if an IO event was filed. That may cause unexpected IO latencies
under !CONFIG_IOTHREAD in SMP scenarios. Fix it by setting the global
exit_request which breaks the loop.
Signed-off-by: Jan Kiszka <address@hidden>
Signed-off-by: Marcelo Tosatti <address@hidden>
---
cpus.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/cpus.c b/cpus.c
index ceb3a83..5dfc54e 100644
--- a/cpus.c
+++ b/cpus.c
@@ -315,6 +315,7 @@ void qemu_notify_event(void)
if (next_cpu && env != next_cpu) {
cpu_exit(next_cpu);
}
+ exit_request = 1;
}
void qemu_mutex_lock_iothread(void) {}
--
1.7.2.3
- [Qemu-devel] [PATCH 08/23] kvm: Drop redundant kvm_enabled from kvm_cpu_thread_fn, (continued)
- [Qemu-devel] [PATCH 08/23] kvm: Drop redundant kvm_enabled from kvm_cpu_thread_fn, Marcelo Tosatti, 2011/02/04
- [Qemu-devel] [PATCH 16/23] kvm: Fix race between timer signals and vcpu entry under !IOTHREAD, Marcelo Tosatti, 2011/02/04
- [Qemu-devel] [PATCH 02/23] Stop current VCPU on synchronous reset requests, Marcelo Tosatti, 2011/02/04
- [Qemu-devel] [PATCH 05/23] Leave inner main_loop faster on pending requests, Marcelo Tosatti, 2011/02/04
- [Qemu-devel] [PATCH 20/23] kvm: Remove static return code of kvm_handle_io, Marcelo Tosatti, 2011/02/04
- [Qemu-devel] [PATCH 10/23] kvm: Provide sigbus services arch-independently, Marcelo Tosatti, 2011/02/04
- [Qemu-devel] [PATCH 15/23] Set up signalfd under !CONFIG_IOTHREAD, Marcelo Tosatti, 2011/02/04
- [Qemu-devel] [PATCH 12/23] kvm: Set up signal mask also for !CONFIG_IOTHREAD, Marcelo Tosatti, 2011/02/04
- [Qemu-devel] [PATCH 06/23] Flatten the main loop, Marcelo Tosatti, 2011/02/04
- [Qemu-devel] [PATCH 01/23] Prevent abortion on multiple VCPU kicks, Marcelo Tosatti, 2011/02/04
- [Qemu-devel] [PATCH 04/23] Trigger exit from cpu_exec_all on pending IO events,
Marcelo Tosatti <=
- [Qemu-devel] [PATCH 14/23] kvm: Call qemu_kvm_eat_signals also under !CONFIG_IOTHREAD, Marcelo Tosatti, 2011/02/04
- [Qemu-devel] [PATCH 09/23] kvm: Handle kvm_init_vcpu errors, Marcelo Tosatti, 2011/02/04
- [Qemu-devel] [PATCH 03/23] Process vmstop requests in IO thread, Marcelo Tosatti, 2011/02/04
- [Qemu-devel] [PATCH 11/23] Refactor signal setup functions in cpus.c, Marcelo Tosatti, 2011/02/04
- [Qemu-devel] [PATCH 17/23] kvm: Add MCE signal support for !CONFIG_IOTHREAD, Marcelo Tosatti, 2011/02/04
- Re: [Qemu-devel] [PATCH 00/23] [PULL] qemu-kvm.git uq/master queue, Anthony Liguori, 2011/02/04