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[Qemu-devel] [RFC PATCH 00/17] Support for multiple "AIO contexts"
From: |
Paolo Bonzini |
Subject: |
[Qemu-devel] [RFC PATCH 00/17] Support for multiple "AIO contexts" |
Date: |
Tue, 25 Sep 2012 14:55:46 +0200 |
This series removes the globals from async.c/aio-posix.c so that
multiple AIO contexts (mini event loops) can be added. Right now,
all block devices still use qemu_bh_new, but switching them to
aio_bh_new would let you associate different files with different
AIO contexts.
As an added bonus, integration with the glib main loop now happens
via GSource. Each AIO context is a GSource, which means you can
choose either to run it in its own thread (this of course needs
proper locking which is not yet here), or to attach it to the main
thread.
In this state this is a bit of an academic exercise (though it works
and may even make sense for 1.3), but I think it's an example of the
tiny steps that can lead us towards an upstreamable version of the
data-plane code.
Paolo
Paolo Bonzini (17):
build: do not rely on indirect inclusion of qemu-config.h
event_notifier: enable it to use pipes
event_notifier: add Win32 implementation
aio: change qemu_aio_set_fd_handler to return void
aio: provide platform-independent API
aio: introduce AioContext, move bottom halves there
aio: add I/O handlers to the AioContext interface
aio: add non-blocking variant of aio_wait
aio: prepare for introducing GSource-based dispatch
aio: add Win32 implementation
aio: make AioContexts GSources
aio: add aio_notify
aio: call aio_notify after setting I/O handlers
main-loop: use GSource to poll AIO file descriptors
main-loop: use aio_notify for qemu_notify_event
aio: clean up now-unused functions
linux-aio: use event notifiers
Makefile.objs | 6 +-
aio.c => aio-posix.c | 159 +++++++++++++++-------
aio.c => aio-win32.c | 190 ++++++++++++++------------
async.c | 118 ++++++++++++++---
block/Makefile.objs | 6 +-
block/blkdebug.c | 1 +
block/iscsi.c | 1 +
event_notifier.c => event_notifier-posix.c | 83 +++++++++---
event_notifier.c => event_notifier-win32.c | 48 +++----
event_notifier.h | 20 ++-
hw/hw.h | 1 +
iohandler.c | 1 +
linux-aio.c | 49 +++----
main-loop.c | 152 +++++++--------------
main-loop.h | 56 +-------
oslib-posix.c | 31 -----
qemu-aio.h | 206 +++++++++++++++++++++++++++--
qemu-char.h | 1 +
qemu-common.h | 2 +-
qemu-config.h | 1 +
qemu-coroutine-lock.c | 2 +-
qemu-os-win32.h | 1 -
22 file modificati, 702 inserzioni(+), 433 rimozioni(-)
copy aio.c => aio-posix.c (48%)
rename aio.c => aio-win32.c (44%)
copy event_notifier.c => event_notifier-posix.c (36%)
rename event_notifier.c => event_notifier-win32.c (49%)
--
1.7.12
- [Qemu-devel] [RFC PATCH 00/17] Support for multiple "AIO contexts",
Paolo Bonzini <=
- [Qemu-devel] [PATCH 01/17] build: do not rely on indirect inclusion of qemu-config.h, Paolo Bonzini, 2012/09/25
- [Qemu-devel] [PATCH 03/17] event_notifier: add Win32 implementation, Paolo Bonzini, 2012/09/25
- [Qemu-devel] [PATCH 02/17] event_notifier: enable it to use pipes, Paolo Bonzini, 2012/09/25
- [Qemu-devel] [PATCH 04/17] aio: change qemu_aio_set_fd_handler to return void, Paolo Bonzini, 2012/09/25
- [Qemu-devel] [PATCH 06/17] aio: introduce AioContext, move bottom halves there, Paolo Bonzini, 2012/09/25
- [Qemu-devel] [PATCH 05/17] aio: provide platform-independent API, Paolo Bonzini, 2012/09/25