Date: Wed, 9 Aug 2017 02:17:19 -0700 From: Mark Millard <markmi@dsl-only.net> To: Gleb Popov <6yearold@gmail.com> Cc: freebsd-hackers <freebsd-hackers@freebsd.org>, Gautam <list@execve.net> Subject: Re: Freebsd 11.0 - system freeze on intensive I/O Message-ID: <10B7A852-29E9-421A-A4C6-8CC21507E201@dsl-only.net> In-Reply-To: <CALH631nexkgNy%2BQBsTC_zj1Pov%2Bji4pomqmHiQvhbkdMzeTL4A@mail.gmail.com> References: <CAD9pFYAAy8jKcABNTun-Y3knrbUreQ7q1-CCj=323HgLMC5e6g@mail.gmail.com> <CALH631nexkgNy%2BQBsTC_zj1Pov%2Bji4pomqmHiQvhbkdMzeTL4A@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On 2017-Aug-9, at 1:35 AM, Gleb Popov <6yearold at gmail.com> wrote: > On Wed, Aug 9, 2017 at 10:11 AM, Gautam <list at execve.net> wrote: >=20 >> Hi, >>=20 >> I raised this topic on freebsd-questions where I suspect a bug caused = due >> to swapfile usage on FreeBSD. >>=20 >> You could read details in the below thread, but summary is that with = using >> a swapfile (not a swap partition) the system freezes on some single = process >> intensive I/O. This is 100% reproducible. >>=20 >> http://marc.info/?l=3Dfreebsd-questions&m=3D150088763825675&w=3D2 >>=20 >> I raised a PR - 220971 ; but there are no backtraces / logs etc. that = could >> possibly help. >>=20 See bugzilla 206048 for some more information: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D206048 >> I would like to help narrow this down, but do not know how. Any = suggestions >> on how to debug a system freeze and what I need to do ? I could then = try to >> reproduce this and collect the needed information - traces etc. It is a long term, known problem, not new with 11.x as I understand. No reasonable fix is known as I understand: it is not a coding error but a design property. >> Thanks, >> Gautam >> _______________________________________________ >> freebsd-hackers@freebsd.org mailing list >> https://lists.freebsd.org/mailman/listinfo/freebsd-hackers >> To unsubscribe, send any mail to = "freebsd-hackers-unsubscribe@freebsd.org" >>=20 >=20 > I also see symptoms you mentioned on my system, but I'm using ZFS. But = my > system is very ancient, so I've been taking it as normal behavior. = Like you > said, intensive disk IO turns OS completely unresponsive, except = pings. =3D=3D=3D Mark Millard markmi at dsl-only.net
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?10B7A852-29E9-421A-A4C6-8CC21507E201>