https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=293368
Bug ID: 293368
Summary: Reads from timerfd return nonsense for a while
Product: Base System
Version: 16.0-CURRENT
Hardware: Any
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
Attachment #268274 text/plain
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Created attachment 268274
--> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=268274&action=edit
Test program
While debugging a bug in KDE Plasma I managed to come up with a minified
example that looks strange to me. The test program creates a timer fd and arms
it so that it ticks once per minute. However, right after start the program is
busy-looping in the poll loop, because reads from timer fd keep returning
nonsensical values. After a while the problem goes away and the poll loop
starts ticking once per minute.
Running the same program on Linux gives the garbage value only on first read,
so no busy-looping there.
The test program is attached to the bug.
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