On Mon, 2015-03-16 at 13:29 +0000, Ross Lagerwall wrote: > From: Andrew Cooper <andrew.coop...@citrix.com> > > POLLHUP|POLLIN is a valid revent to receive when there is readable data in a > pipe, but the writable fd has been closed. This occurs in migration v2 when > the legacy conversion process (which transforms the data inline) completes and > exits successfully. > > In the case that there is data to read, suppress the POLLHUP. POSIX states > that the hangup state is latched[1], which means it will reoccur on subsequent > poll() calls. The datacopier is thus provided the opportunity to read until > EOF, if possible. > > A POLLHUP on its own is treated exactly as before, indicating a different > error with the fd. > > [1] http://pubs.opengroup.org/onlinepubs/9699919799/functions/poll.html > > Signed-off-by: Andrew Cooper <andrew.coop...@citrix.com>
Acked-by: Ian Campbell <ian.campb...@citrix.com> _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
