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util: epoll_run: allow interrupting event polling

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If an event handler returns a positive value, the event polling and
handling loop is interrupted after all the pending events indicated by
epoll_wait are processed.

travis-ci: success for lazy-pages: add non-#PF events handling
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>
This commit is contained in:
Mike Rapoport 2017-01-09 10:23:17 +02:00 • committed by Andrei Vagin
parent 82668f6734
commit fcfdc19610
1 changed files with 6 additions and 0 deletions
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6
criu/util.c
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@ -1231,6 +1231,7 @@ int epoll_add_rfd(int epfd, struct epoll_rfd *rfd)
int epoll_run_rfds(int epollfd, struct epoll_event *evs, int nr_fds, int timeout)
{
int ret, i, nr_events;
bool have_a_break = false;
while (1) {
/* FIXME -- timeout should decrease over time... */
@ -1251,7 +1252,12 @@ int epoll_run_rfds(int epollfd, struct epoll_event *evs, int nr_fds, int timeout
ret = rfd->revent(rfd);
if (ret < 0)
goto out;
if (ret > 0)
have_a_break = true;
}
if (have_a_break)
return 1;
}
out:
return ret;