Date: Mon, 20 Apr 2020 21:09:10 +0000 From: bugzilla-noreply@freebsd.org To: virtualization@FreeBSD.org Subject: [Bug 235856] FreeBSD freezes on AWS EC2 t3 machines Message-ID: <bug-235856-27103-HVTL6ti8HS@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-235856-27103@https.bugs.freebsd.org/bugzilla/> References: <bug-235856-27103@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=235856 --- Comment #51 from Colin Percival <cperciva@FreeBSD.org> --- (In reply to mail from comment #50) Hi Ruben, Thanks! This is consistent with my current understanding, which is that the patch I provided fixes the data structure corruption issues (which showed up as some of the more "interesting" warnings and also sometimes as kernel panics). The timeouts and freezing appear to be due to the ENA driver having trouble allocating jumbo mbuf clusters during low-memory conditions. Can you check "sysctl -a | grep mjum_alloc_fail" (ideally, log it every minute and see if it jumps around the times you see hanging)? I have a patch which I believe fixes this which I'd be happy to share if you want to try something experimental -- we're still discussing details about the best way to address this, though. Colin -- You are receiving this mail because: You are the assignee for the bug.
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