Date: Wed, 9 Aug 2017 16:52:37 +0700 From: Eugene Grosbein <eugen@grosbein.net> To: Gautam <list@execve.net>, freebsd-hackers@freebsd.org Subject: Re: Freebsd 11.0 - system freeze on intensive I/O Message-ID: <598ADB65.8060701@grosbein.net> In-Reply-To: <CAD9pFYAAy8jKcABNTun-Y3knrbUreQ7q1-CCj=323HgLMC5e6g@mail.gmail.com> References: <CAD9pFYAAy8jKcABNTun-Y3knrbUreQ7q1-CCj=323HgLMC5e6g@mail.gmail.com>
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09.08.2017 14:11, Gautam пишет: > Hi, > > I raised this topic on freebsd-questions where I suspect a bug caused due > to swapfile usage on FreeBSD. > > 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. > > http://marc.info/?l=freebsd-questions&m=150088763825675&w=2 > > I raised a PR - 220971 ; but there are no backtraces / logs etc. that could > possibly help. > > 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. Swapfile is definitely broken in supported FreeBSD releases, it hangs the system. The only known workaround (to me) is not using it.
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