[Vm-dev] [OpenSmalltalk/opensmalltalk-vm] Problems with Linux VM - EPOLL (Issue #615)

David T Lewis notifications at github.com
Mon Feb 21 22:48:58 UTC 2022


Reported on vm-dev mailing list: http://lists.squeakfoundation.org/pipermail/vm-dev/2022-February/037652.html

Hi Levente and All,

Just wanted to pass on some information about EPOLL and Linux.

We were working on sharing our applications through RFB but were having an
issue where keyboard input created a change on the remote window but the
changes were not showing up.  You could see the issue with a simple browser
doing a web search on google and pressing enter.  The screen froze but if
you clicked with a mouse or created any other event the changes showed up.
Eliot suggested the issue could be with EPOLL not signaling the semaphore
properly when data was available on the socket.  After Eliot created a new
EPOLL-less linux vm the problems went away.  There does appear to be an
issue with EPOLL on linux.

All the best,

Ron Teitelbaum

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