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Re: [Qemu-devel] main-loop.c: About Select handling
From: |
Furukawa, Eiji |
Subject: |
Re: [Qemu-devel] main-loop.c: About Select handling |
Date: |
Thu, 6 Dec 2012 00:30:19 +0000 |
The select() do not masked signal in os_host_main_loop_wait.
For example, qemu-timer.c gives SIGALRM regularly.
Even if a buffer of select is empty,
I think that it is a problem that this select() does exit by this SIGALRM.
--
E.Furukawa
> -----Original Message-----
> From: Stefan Hajnoczi [mailto:address@hidden
> Sent: Thursday, November 29, 2012 11:18 PM
> To: Furukawa, Eiji/古川 英治
> Cc: address@hidden
> Subject: Re: [Qemu-devel] main-loop.c: About Select handling
>
> On Wed, Nov 28, 2012 at 03:08:24AM +0000, Furukawa, Eiji wrote:
> > About a source of qemu-1.2.0/main-loop.c The select handling of
> > os_host_main_loop_wait function I do not seem to do Exit by interrupts
> > such as SIGUSR1 Will not it be necessary to make modifications?
> >
> > Before
> > LineNumber:308 ret = select(nfds + 1, &rfds, &wfds, &xfds, tvarg);
> >
> > After(Example)
> > do {
> > ret = select(nfds + 1, &rfds, &wfds, &xfds, tvarg);
> > } while(ret == -1 && (errno == EINTR || errno == EAGAIN))
>
> What is the specific bug or problem you're seeing?
>
> QEMU uses several signals internally and sets up per-thread signal masks
> appropriately.
>
> Stefan
- Re: [Qemu-devel] main-loop.c: About Select handling,
Furukawa, Eiji <=