Date: Thu, 25 Aug 2016 13:54:37 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-ports-bugs@FreeBSD.org Subject: [Bug 212128] Default AIO settings break VirtualBox Message-ID: <bug-212128-13-5w7oLNHYeP@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-212128-13@https.bugs.freebsd.org/bugzilla/> References: <bug-212128-13@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D212128 Jan Bramkamp <crest@bultmann.eu> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |crest@bultmann.eu --- Comment #1 from Jan Bramkamp <crest@bultmann.eu> --- In-flight AIO requests require kernel resources (threads, kernel memory), because of this the kernel limits the concurrency. This sounds like Virtual= Box tries to issue too many AIO requests and ignores the errors. Just increasing the limits to something that doesn't fail on your system with your workload doesn't fix such a but. At best (or worst) it hides the bug. An application= is expected to handle temporary AIO errors. Possible strategies include falling back to synchronous IO, retrying the AIO with an exponential backoff or just reporting the temporary error to the next layer. --=20 You are receiving this mail because: You are the assignee for the bug.=
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