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lazy-pages: make complete_forks more robust

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The complete_forks function presumes that it always has a work to do
because we assume that fork event is the only case when we drop out of
epoll_run_rfds with positive return value.

Teach complete_forks to bail out when there is no pending forks to process
to allow exiting epoll_run_rfds for different reasons.

Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>
This commit is contained in:
Mike Rapoport 2018-03-25 16:27:29 +03:00 • committed by Andrei Vagin
parent b11f579626
commit f68dcdde83
1 changed files with 3 additions and 0 deletions
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criu/uffd.c
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@ -965,6 +965,9 @@ static int complete_forks(int epollfd, struct epoll_event **events, int *nr_fds)
{
struct lazy_pages_info *lpi, *n;
if (list_empty(&pending_lpis))
return 0;
list_for_each_entry(lpi, &pending_lpis, l)
(*nr_fds)++;