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Re: [Qemu-devel] [PATCH] Use SIGIO with caution
From: |
Jan Kiszka |
Subject: |
Re: [Qemu-devel] [PATCH] Use SIGIO with caution |
Date: |
Tue, 31 May 2011 16:06:26 +0200 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686 (x86_64); de; rv:1.8.1.12) Gecko/20080226 SUSE/2.0.0.12-1.1 Thunderbird/2.0.0.12 Mnenhy/0.7.5.666 |
On 2011-05-31 15:47, Anthony Liguori wrote:
> On 05/29/2011 04:50 PM, Andreas Färber wrote:
>> BeOS and Haiku don't define SIGIO. When undefined, it won't arrive
>> and doesn't need to be blocked.
>>
>> Signed-off-by: Andreas Färber<address@hidden>
>
> Anything to do with signal masks is never a trivial patch BTW...
>
> But I actually think explicit handling of SIGIO is unneeded. I think
> this is a hold over from the pre-I/O thread days where we selectively
> set SIGIO on certain file descriptors to make sure that when an IO fd
> became readable, we received a signal to break out of the KVM emulation
> loop.
>
> Can the folks on CC confirm/deny?
>
> I can't see any use of SIGIO in the current source tree.
At least qemu-timer.c uses SIGIO in HPET mode. That only applies to
Linux hosts, though.
Jan
--
Siemens AG, Corporate Technology, CT T DE IT 1
Corporate Competence Center Embedded Linux
- [Qemu-devel] [PATCH] Use SIGIO with caution, Andreas Färber, 2011/05/29
- Re: [Qemu-devel] [PATCH] Use SIGIO with caution, Anthony Liguori, 2011/05/31
- Re: [Qemu-devel] [PATCH] Use SIGIO with caution,
Jan Kiszka <=
- Re: [Qemu-devel] [PATCH] Use SIGIO with caution, Anthony Liguori, 2011/05/31
- Re: [Qemu-devel] [PATCH] Use SIGIO with caution, Jan Kiszka, 2011/05/31
- Re: [Qemu-devel] [PATCH] Use SIGIO with caution, Alexander Graf, 2011/05/31
- Re: [Qemu-devel] [PATCH] Use SIGIO with caution, Anthony Liguori, 2011/05/31
- Re: [Qemu-devel] [PATCH] Use SIGIO with caution, Alexander Graf, 2011/05/31
- Re: [Qemu-devel] [PATCH] Use SIGIO with caution, Anthony Liguori, 2011/05/31
- Re: [Qemu-devel] [PATCH] Use SIGIO with caution, Andreas Färber, 2011/05/31
- Re: [Qemu-devel] [PATCH] Use SIGIO with caution, Jan Kiszka, 2011/05/31
- Re: [Qemu-devel] [PATCH] Use SIGIO with caution, Anthony Liguori, 2011/05/31
Re: [Qemu-devel] [PATCH] Use SIGIO with caution, Avi Kivity, 2011/05/31