Paolo Bonzini 05e514b1d4 AioContext: optimize clearing the EventNotifier ... It is pretty rare for aio_notify to actually set the EventNotifier. It can happen with worker threads such as thread-pool.c's, but otherwise it should never be set thanks to the ctx->notify_me optimization. The previous patch, unfortunately, added an unconditional call to event_notifier_test_and_clear; now add a userspace fast path that avoids the call. Note that it is not possible to do the same with event_notifier_set; it would break, as proved (again) by the included formal model. This patch survived over 3000 reboots on aarch64 KVM. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Fam Zheng <famz@redhat.com> Tested-by: Richard W.M. Jones <rjones@redhat.com> Message-id: 1437487673-23740-7-git-send-email-pbonzini@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>		2015-07-22 12:41:40 +01:00
..
qmp	migration: create migration event	2015-07-07 14:54:55 +02:00
specs	Revert "vhost-user: add multi queue support"	2015-07-20 14:19:40 +03:00
aio_notify.promela	AioContext: fix broken ctx->dispatching optimization	2015-07-22 12:41:40 +01:00
aio_notify_accept.promela	AioContext: optimize clearing the EventNotifier	2015-07-22 12:41:40 +01:00
aio_notify_bug.promela	AioContext: fix broken placement of event_notifier_test_and_clear	2015-07-22 12:41:40 +01:00
atomics.txt	docs/atomics.txt: fix two typos	2015-04-30 16:05:48 +03:00
bitmaps.md	qapi: Rename 'dirty-bitmap' mode to 'incremental'	2015-07-02 09:20:18 +01:00
blkdebug.txt	block: Rename BlockDriverCompletionFunc to BlockCompletionFunc	2014-10-20 13:41:27 +02:00
blkverify.txt	blkverify: Add block driver for verifying I/O	2010-09-21 17:00:53 +02:00
bootindex.txt	Typo, spelling and grammatical fixes	2013-04-12 14:33:20 +02:00
ccid.txt	libcacard: improve documentation	2014-06-10 07:44:01 +02:00
ich9-ehci-uhci.cfg	usb: update documentation	2011-07-08 11:25:56 +02:00
image-fuzzer.txt	docs: List all image elements currently supported by the fuzzer	2014-09-22 11:39:35 +01:00
libcacard.txt	libcacard: Spelling and grammar fixes in documentation	2012-03-08 15:22:11 +00:00
live-block-ops.txt	docs: describe live block operations	2012-01-26 14:49:18 +01:00
memory-hotplug.txt	docs: update documentation for memory hot unplug	2015-04-27 21:07:38 +02:00
memory.txt	docs: clarify memory region lifecycle	2015-02-16 17:30:19 +01:00
migration.txt	migration: Use normal VMStateDescriptions for Subsections	2015-06-12 06:53:57 +02:00
multi-thread-compression.txt	docs: Add a doc about multiple thread compression	2015-05-06 17:36:57 +02:00
multiple-iothreads.txt	docs/multiple-iothreads.txt: add documentation on IOThread programming	2014-08-15 15:07:13 +02:00
multiseat.txt	update pci-bridge-seat section in docs/multiseat.txt	2015-07-03 12:21:11 +02:00
pci_expander_bridge.txt	docs: Add PXB documentation	2015-06-03 18:19:19 +02:00
q35-chipset.cfg	q35: Add PCIe switch to example q35 configuration	2013-08-21 12:39:15 +03:00
qapi-code-gen.txt	qapi: Drop bogus command from docs	2015-06-18 14:12:33 +02:00
qdev-device-use.txt	docs: Fix qdev-device-use.txt typo in -chardev serial, path=COM<NUM>	2011-09-09 09:43:17 +01:00
qemupciserial.inf	Docs: Introduce multiport serial support in qemupciserial.inf.	2014-03-12 10:33:23 +01:00
rcu.txt	rcu: add g_free_rcu	2015-02-16 17:30:19 +01:00
rdma.txt	rdma: Fix incorrect description in comments	2014-09-20 17:55:53 +04:00
spice-port-fqdn.txt	docs: add spice-port-fqdn.txt	2012-12-17 14:01:41 +01:00
tracing.txt	Tracing docs fix configure option and description	2014-11-18 14:05:54 +00:00
usb-storage.txt	Fix typos and misspellings	2013-03-22 13:25:07 +01:00
usb2.txt	usb: update docs for bus name change	2013-04-03 11:39:43 +02:00
virtio-balloon-stats.txt	virtio-balloon: return empty data when no stats are available	2014-05-25 12:46:58 +03:00
vnc-ledstate-Pseudo-encoding.txt	doc: document the Pseudo-encoding of LED state	2013-04-29 08:28:51 -05:00
writing-qmp-commands.txt	docs/writing-qmp-commands: fix a typo	2015-06-03 14:21:23 +03:00
xbzrle.txt	xbzrle: optimize XBZRLE to decrease the cache misses	2015-01-15 17:49:43 +05:30
xen-save-devices-state.txt	Introduce "xen-save-devices-state"	2012-03-19 18:21:00 +00:00