[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [PATCH 33/35] kvm: Do not use qemu_fair_mutex
From: |
Marcelo Tosatti |
Subject: |
[Qemu-devel] [PATCH 33/35] kvm: Do not use qemu_fair_mutex |
Date: |
Thu, 6 Jan 2011 15:56:39 -0200 |
From: Jan Kiszka <address@hidden>
The imbalance in the hold time of qemu_global_mutex only exists in TCG
mode. In contrast to TCG VCPUs, KVM drops the global lock during guest
execution. We already avoid touching the fairness lock from the
IO-thread in KVM mode, so also stop using it from the VCPU threads.
Signed-off-by: Jan Kiszka <address@hidden>
Signed-off-by: Marcelo Tosatti <address@hidden>
---
cpus.c | 2 --
1 files changed, 0 insertions(+), 2 deletions(-)
diff --git a/cpus.c b/cpus.c
index 0309189..4c9928e 100644
--- a/cpus.c
+++ b/cpus.c
@@ -735,9 +735,7 @@ static sigset_t block_io_signals(void)
void qemu_mutex_lock_iothread(void)
{
if (kvm_enabled()) {
- qemu_mutex_lock(&qemu_fair_mutex);
qemu_mutex_lock(&qemu_global_mutex);
- qemu_mutex_unlock(&qemu_fair_mutex);
} else {
qemu_mutex_lock(&qemu_fair_mutex);
if (qemu_mutex_trylock(&qemu_global_mutex)) {
--
1.7.2.3
- [Qemu-devel] [PATCH 27/35] kvm: x86: Fix !CONFIG_KVM_PARA build, (continued)
- [Qemu-devel] [PATCH 27/35] kvm: x86: Fix !CONFIG_KVM_PARA build, Marcelo Tosatti, 2011/01/06
- [Qemu-devel] [PATCH 20/35] kvm: x86: Remove redundant mp_state initialization, Marcelo Tosatti, 2011/01/06
- [Qemu-devel] [PATCH 13/35] kvm: Fix coding style violations, Marcelo Tosatti, 2011/01/06
- [Qemu-devel] [PATCH 35/35] kvm: x86: Only read/write MSR_KVM_ASYNC_PF_EN if supported, Marcelo Tosatti, 2011/01/06
- [Qemu-devel] [PATCH 24/35] Synchronize VCPU states before reset, Marcelo Tosatti, 2011/01/06
- [Qemu-devel] [PATCH 10/35] kvm: x86: Remove obsolete SS.RPL/DPL aligment, Marcelo Tosatti, 2011/01/06
- [Qemu-devel] [PATCH 14/35] kvm: Drop return value of kvm_cpu_exec, Marcelo Tosatti, 2011/01/06
- [Qemu-devel] [PATCH 03/35] Clean up cpu_inject_x86_mce(), Marcelo Tosatti, 2011/01/06
- [Qemu-devel] [PATCH 17/35] x86: Optionally dump code bytes on cpu_dump_state, Marcelo Tosatti, 2011/01/06
- [Qemu-devel] [PATCH 33/35] kvm: Do not use qemu_fair_mutex,
Marcelo Tosatti <=
- [Qemu-devel] [PATCH 15/35] kvm: Stop on all fatal exit reasons, Marcelo Tosatti, 2011/01/06
- [Qemu-devel] [PATCH 16/35] kvm: Improve reporting of fatal errors, Marcelo Tosatti, 2011/01/06
- [Qemu-devel] [PATCH 05/35] Add function for checking mca broadcast of CPU, Marcelo Tosatti, 2011/01/06
- [Qemu-devel] [PATCH 07/35] kvm: kvm_mce_inj_* subroutines for templated error injections, Marcelo Tosatti, 2011/01/06
- [Qemu-devel] [PATCH 04/35] Add "broadcast" option for mce command, Marcelo Tosatti, 2011/01/06
- [Qemu-devel] [PATCH 18/35] kvm: x86: Align kvm_arch_put_registers code with comment, Marcelo Tosatti, 2011/01/06
- [Qemu-devel] [PATCH 06/35] kvm: introduce kvm_mce_in_progress, Marcelo Tosatti, 2011/01/06
- [Qemu-devel] [PATCH 21/35] kvm: x86: Fix xcr0 reset mismerge, Marcelo Tosatti, 2011/01/06