Re: [PATCH v7 04/10] fsmonitor: use pthread_cond_timedwait for cookie wait

> From: Paul Tarjan <github@paulisageek.com>
> 
> The cookie wait in with_lock__wait_for_cookie() uses an infinite
> pthread_cond_wait() loop.  The existing comment notes the desire
> to switch to pthread_cond_timedwait(), but the routine was not
> available in git thread-utils.
> 
> On certain container or overlay filesystems, inotify watches may
> succeed but events are never delivered.  In this case the daemon
> would hang indefinitely waiting for the cookie event, which in
> turn causes the client to hang.
> 
> Replace the infinite wait with a one-second timeout using
> pthread_cond_timedwait().  If the timeout fires, report an
> error and let the client proceed with a trivial (full-scan)
> response rather than blocking forever.