From: Paolo Bonzini <pbonzini@redhat.com>
To: qemu-devel@nongnu.org
Cc: stefanha@redhat.com
Subject: [Qemu-devel] [PATCH 01/16] aio: introduce aio_context_in_iothread
Date: Fri, 15 Jan 2016 16:12:04 +0100 [thread overview]
Message-ID: <1452870739-28484-2-git-send-email-pbonzini@redhat.com> (raw)
In-Reply-To: <1452870739-28484-1-git-send-email-pbonzini@redhat.com>
This will be used by the synchronous I/O helpers, to choose between
aio_poll or QemuEvent.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
include/block/aio.h | 7 +++++++
iothread.c | 9 +++++++++
2 files changed, 16 insertions(+)
diff --git a/include/block/aio.h b/include/block/aio.h
index e086e3b..9434665 100644
--- a/include/block/aio.h
+++ b/include/block/aio.h
@@ -435,6 +435,13 @@ static inline bool aio_node_check(AioContext *ctx, bool is_external)
}
/**
+ * @ctx: the aio context
+ *
+ * Return whether we are running in the I/O thread that manages @ctx.
+ */
+bool aio_context_in_iothread(AioContext *ctx);
+
+/**
* aio_context_setup:
* @ctx: the aio context
*
diff --git a/iothread.c b/iothread.c
index 1b8c2bb..1150912 100644
--- a/iothread.c
+++ b/iothread.c
@@ -19,6 +19,7 @@
#include "qmp-commands.h"
#include "qemu/error-report.h"
#include "qemu/rcu.h"
+#include "qemu/main-loop.h"
typedef ObjectClass IOThreadClass;
@@ -27,6 +28,13 @@ typedef ObjectClass IOThreadClass;
#define IOTHREAD_CLASS(klass) \
OBJECT_CLASS_CHECK(IOThreadClass, klass, TYPE_IOTHREAD)
+static __thread IOThread *my_iothread;
+
+bool aio_context_in_iothread(AioContext *ctx)
+{
+ return ctx == (my_iothread ? my_iothread->ctx : qemu_get_aio_context());
+}
+
static void *iothread_run(void *opaque)
{
IOThread *iothread = opaque;
@@ -34,6 +42,7 @@ static void *iothread_run(void *opaque)
rcu_register_thread();
+ my_iothread = iothread;
qemu_mutex_lock(&iothread->init_done_lock);
iothread->thread_id = qemu_get_thread_id();
qemu_cond_signal(&iothread->init_done_cond);
--
2.5.0
next prev parent reply other threads:[~2016-01-15 15:12 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-15 15:12 [Qemu-devel] [PATCH 00/16] aio: first part of aio_context_acquire/release pushdown Paolo Bonzini
2016-01-15 15:12 ` Paolo Bonzini [this message]
2016-01-15 15:12 ` [Qemu-devel] [PATCH 02/16] aio: do not really acquire/release the main AIO context Paolo Bonzini
2016-01-15 15:12 ` [Qemu-devel] [PATCH 03/16] aio: introduce aio_poll_internal Paolo Bonzini
2016-01-15 15:12 ` [Qemu-devel] [PATCH 04/16] aio: only call aio_poll_internal from iothread Paolo Bonzini
2016-01-15 15:12 ` [Qemu-devel] [PATCH 05/16] iothread: release AioContext around aio_poll Paolo Bonzini
2016-02-02 14:52 ` Stefan Hajnoczi
2016-02-02 15:01 ` Paolo Bonzini
2016-02-03 9:34 ` Stefan Hajnoczi
2016-02-03 9:52 ` Paolo Bonzini
2016-02-05 17:51 ` Stefan Hajnoczi
2016-02-08 15:34 ` Paolo Bonzini
2016-01-15 15:12 ` [Qemu-devel] [PATCH 06/16] qemu-thread: introduce QemuRecMutex Paolo Bonzini
2016-01-15 15:12 ` [Qemu-devel] [PATCH 07/16] aio: convert from RFifoLock to QemuRecMutex Paolo Bonzini
2016-01-15 15:12 ` [Qemu-devel] [PATCH 08/16] aio: rename bh_lock to list_lock Paolo Bonzini
2016-01-15 15:12 ` [Qemu-devel] [PATCH 09/16] qemu-thread: introduce QemuLockCnt Paolo Bonzini
2016-01-15 15:12 ` [Qemu-devel] [PATCH 10/16] aio: make ctx->list_lock a QemuLockCnt, subsuming ctx->walking_bh Paolo Bonzini
2016-01-15 15:12 ` [Qemu-devel] [PATCH 11/16] qemu-thread: optimize QemuLockCnt with futexes on Linux Paolo Bonzini
2016-01-15 15:12 ` [Qemu-devel] [PATCH 12/16] aio: tweak walking in dispatch phase Paolo Bonzini
2016-01-15 15:12 ` [Qemu-devel] [PATCH 13/16] aio-posix: remove walking_handlers, protecting AioHandler list with list_lock Paolo Bonzini
2016-01-15 15:12 ` [Qemu-devel] [PATCH 14/16] aio-win32: " Paolo Bonzini
2016-01-15 15:12 ` [Qemu-devel] [PATCH 15/16] aio: document locking Paolo Bonzini
2016-01-15 15:12 ` [Qemu-devel] [PATCH 16/16] aio: push aio_context_acquire/release down to dispatching Paolo Bonzini
2016-02-02 9:41 ` [Qemu-devel] [PATCH 00/16] aio: first part of aio_context_acquire/release pushdown Paolo Bonzini
2016-02-02 17:26 ` Stefan Hajnoczi
2016-02-08 16:14 [Qemu-devel] [PATCH v2 " Paolo Bonzini
2016-02-08 16:14 ` [Qemu-devel] [PATCH 01/16] aio: introduce aio_context_in_iothread Paolo Bonzini
2016-02-09 11:45 [Qemu-devel] [PATCH v3 00/16] aio: first part of aio_context_acquire/release pushdown Paolo Bonzini
2016-02-09 11:45 ` [Qemu-devel] [PATCH 01/16] aio: introduce aio_context_in_iothread Paolo Bonzini
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