Re: [kvm-devel] [patch 1/2] QEMU: use SIGARLM for alarm timers, enable SIGIO on qemu_set_fd_handler2()

[Avi K. <av...@qu...>]

Marcelo Tosatti wrote:
> On Fri, Apr 11, 2008 at 01:59:35PM -0500, Anthony Liguori wrote:
>   
>> With the IO thread, shouldn't we be striving to perform the select()s 
>> within the IO thread itself to completely avoid the need to use SIGIO at 
>> all?
>>     
>
> Fully agree. Problem with it are the fundamental changes in qemu that
> are required (and the difficulty merging those in qemu).
>
>   

One is tempted to use pselect() to temporarily unblock the signals while 
waiting.  This has two problems, though:  one, pselect() is emulated in 
libc with older kernels, and this emulation has an (unavoidable) race.  
Two, I think pselect() will deliver the signal in addition to returning, 
which we want to avoid.  Not sure about this though.

-- 
error compiling committee.c: too many arguments to function