Re: Spawning threads in KVM/QEMU

[Dor Laor <dor.laor-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

[-- Attachment #1.1: Type: text/plain, Size: 1194 bytes --]

Luca Tettamanti wrote:
> On Nov 13, 2007 11:42 PM, Dor Laor <dor.laor-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>   
>> Anthony Liguori wrote:
>>     
>>> I've been experimenting with creating IO threads for the PV device
>>> drivers.  Unfortunately, my experiments haven't gotten very far as QEMU
>>> tends to hang up a bit into booting the guest whenever I spawn a thread
>>> that does any sort of read/write on a file descriptor.  My suspicion is
>>> that it has something to do with signals being delivered to the wrong
>>> thread but after masking out all the signals for this thread, I still
>>> had no luck.
>>>
>>>       
>> Maybe you set the mask too late? try setting it before creating the thread:
>>  sigfillset(&thread_sig_mask);
>>  sigdelset(&thread_sig_mask,SIGILL);
>>  sigdelset(&thread_sig_mask,SIGFPE);
>>  sigdelset(&thread_sig_mask,SIGSEGV);
>>     
>
> When using RTC or HPET for timing you also need to mask SIGIO; you may
> also need to change F_SETOWN (enable_sigio_timer) with the correct
> thread id, i.e.:
>
> fcntl(fd, F_SETOWN, gettid());
>
> Luca
>
>   
I do mask SIGIO - first the set is fiilled, then SGILL,SIGFPE,SIGSEGV 
are back enabled.
Regards, Dor

[-- Attachment #1.2: Type: text/html, Size: 1801 bytes --]

[-- Attachment #2: Type: text/plain, Size: 314 bytes --]

-------------------------------------------------------------------------
This SF.net email is sponsored by: Splunk Inc.
Still grepping through log files to find problems?  Stop.
Now Search log events and configuration files using AJAX and a browser.
Download your FREE copy of Splunk now >> http://get.splunk.com/

[-- Attachment #3: Type: text/plain, Size: 186 bytes --]

_______________________________________________
kvm-devel mailing list
kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
https://lists.sourceforge.net/lists/listinfo/kvm-devel