From owner-freebsd-bugs@freebsd.org Sat Aug 12 05:17:28 2017 Return-Path: Delivered-To: freebsd-bugs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 34116D93959 for ; Sat, 12 Aug 2017 05:17:28 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 2235074301 for ; Sat, 12 Aug 2017 05:17:28 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from bugs.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id v7C5HRY8069408 for ; Sat, 12 Aug 2017 05:17:27 GMT (envelope-from bugzilla-noreply@freebsd.org) From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 220971] Freebsd 11.0p11 - system freeze on intensive I/O Date: Sat, 12 Aug 2017 05:17:28 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 11.0-RELEASE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: execve@gmail.com X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: freebsd-bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 12 Aug 2017 05:17:28 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D220971 --- Comment #2 from execve@gmail.com --- =E2=80=8BOne update on this one. I installed a custom stable/11 kernel and = world (sched =3D 4BSD was the only change), and the problem is no longer seen. From my untrained eyes, it looks like some kind of swap request starvation causing a hang when ULE is in use.=E2=80=8B root@mellon:~ # uname -a FreeBSD mellon 11.1-STABLE FreeBSD 11.1-STABLE #0 r313908+14aefcc16ee(stable/11): Sat Aug 12 00:33:04 IST 2017=20=20=20=20 root@mellon:/usr/obj/usr/home/user1/src/freebsd/sys/MYKERNEL amd64 --=20 You are receiving this mail because: You are the assignee for the bug.=