Re: [PATCH] vircommand: fix polling in virCommandProcessIO

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



  Martin Kletzander wrote:

> On Tue, Apr 21, 2015 at 08:19:45PM +0300, Roman Bogorodskiy wrote:
> >When running on FreeBSD, there's a bug in virCommandProcessIO
> >polling that is triggered by the commandtest.
> >
> >A test that triggers EPIPE in commandtest (named "test20") hungs
> >forever on FreeBSD.
> >
> >Apparently, this happens because FreeBSD sets POLLHUP flag on revents
> >when stdin in closed. And as the current implementation only checks for
> >POLLOUT and POLLERR, it ends up looping forever inside
> >virCommandProcessIO and not trying to do one more write() that would
> >trigger EPIPE.
> >
> >To fix that check for the POLLHUP flag along with POLLOUT and POLLERR.
> 
> We're already checking that for the pipe heading the other way and
> according to information I found it makes sense to do this, even
> though it seems that according to documentation this shouldn't happen.
> 
> ACK

Pushed, thanks!

Roman Bogorodskiy

Attachment: pgpc9Wi1WvrVb.pgp
Description: PGP signature

--
libvir-list mailing list
libvir-list@xxxxxxxxxx
https://www.redhat.com/mailman/listinfo/libvir-list

[Index of Archives]     [Virt Tools]     [Libvirt Users]     [Lib OS Info]     [Fedora Users]     [Fedora Desktop]     [Fedora SELinux]     [Big List of Linux Books]     [Yosemite News]     [KDE Users]     [Fedora Tools]