On Thu, Jun 14, 2018 at 11:59:20PM -0700, Josh Triplett wrote: > On Thu, Jun 14, 2018 at 11:56:03PM -0700, Josh Triplett wrote: > > reassign 901497 > > retitle 901497 Xwayland: hangs spinning on write and SIGALRM > > thanks > > > > After further investigation, I can reproduce this with Mesa 18.0.5-1 as > > well, just not as often. > > > > After encountering this issue, I managed to switch to a text console, > > and found that Xwayland was using 100% CPU. strace of the running > > Xwayland produced the attached strace, in which Xwayland appears to be > > spinning, running a zero-byte writev, and periodically processing a > > SIGALRM. Other threads appear to be blocked on futexes. > > Forgot to attach the strace, sorry. Will provide one again next time it > happens, but it consisted entirely of "write(14, [], 0) = 0" on one > thread. Here's a fresh strace. I'm encountering this quite frequently.
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