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# Date Author Comment
6b620ca3 01/13/2012 06:55 pm Paolo Bonzini

prepare for future GPLv2+ relicensing

All files under GPLv2 will get GPLv2+ changes starting tomorrow.
event_notifier.c and exec-obsolete.h were only ever touched by Red Hat
employees and can be relicensed now.

Signed-off-by: Paolo Bonzini <>...
7f84c127 10/21/2011 07:01 pm Peter Maydell

compatfd.c: Don't pass NULL pointer to SYS_signalfd

Don't pass a NULL pointer in to SYS_signalfd in qemu_signalfd_available():
this isn't valid and Valgrind complains about it.

Signed-off-by: Peter Maydell <>
Reviewed-by: Stefan Hajnoczi <>...
d25f89c9 07/23/2011 07:26 pm Jan Kiszka

Register Linux dyntick timer as per-thread signal

Derived from kvm-tool patch
http://thread.gmane.org/gmane.comp.emulators.kvm.devel/74309

Ingo Molnar pointed out that sending the timer signal to the whole
process, just blocking it everywhere, is suboptimal with an increasing...
09716e45 06/11/2011 12:18 am Alexander Graf

sigfd: use pthread_sigmask

Qemu uses signalfd to figure out, if a signal occured without the need
to actually receive the signal. Instead, it can read from the fd to receive
its news.

Now, we obviously don't always have signalfd around. Especially not on...
30faaf70 02/25/2011 10:16 pm Tristan Gingold

Use sigwait instead of sigwaitinfo.

Fix compilation failure on Darwin.

Signed-off-by: Tristan Gingold <>
Signed-off-by: Blue Swirl <>
dcc38d1c 10/21/2010 12:15 am Marcelo Tosatti

signalfd compatibility

Port qemu-kvm's signalfd compat code.

commit 5a7fdd0abd7cd24dac205317a4195446ab8748b5
Author: Anthony Liguori <>
Date: Wed May 7 11:55:47 2008 -0500

Use signalfd() in io-thread
This patch reworks the IO thread to use signalfd() instead of sigtimedwait()...
9e472e10 10/08/2008 10:50 pm aliguori

Fix IO performance regression in sparc

Replace signalfd with signal handler/pipe. There is no way to interrupt
the CPU execution loop when a file descriptor becomes readable. This
results in a large performance regression in sparc emulation during
bootup....
27463101 09/27/2008 11:58 pm aliguori

Make compatfd fallback more robust

Be more friendly when signalfd() fails, and also add configure checks to detect
that syscall(SYS_signalfd) actually works. malc pointed out that some installs
do not have /usr/include/linux headers that are in sync with the glibc headers...
b8ae7553 09/27/2008 11:41 pm aliguori

Fix whitespace damage in compatfd

Spotted by malc.

Signed-off-by: Anthony Liguori <>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5333 c046a42c-6fe2-441c-8c8c-71466251a162
bcdf9b4d 09/10/2008 09:18 pm aliguori

Add missing files from previous commit.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5188 c046a42c-6fe2-441c-8c8c-71466251a162