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Subject: Re: get_swap_pager(x) failed
From: Mark Millard <markmi@dsl-only.net>
In-Reply-To: <20171214054320.GA3198@server.rulingia.com>
Date: Wed, 13 Dec 2017 21:57:46 -0800
Cc: Gary Palmer <gpalmer@freebsd.org>, blubee blubeeme <gurenchan@gmail.com>,
 FreeBSD Current <freebsd-current@freebsd.org>
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To: Peter Jeremy <peter@rulingia.com>
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On 2017-Dec-13, at 9:43 PM, Peter Jeremy <peter@rulingia.com> wrote:

> On 2017-Dec-13 11:23:46 +0000, Gary Palmer <gpalmer@freebsd.org> wrote:
>> An open question would be why ARC is not reducing if the system is
>> under memory pressure.  It's meant to, but there have been various
>> bugs in that implementation.
> 
> The OP doesn't say what version of -current he is running but I would
> point the finger at r325851.  I have discovered that, in 11-stable,
> r326619 (which is the MFC of r325851) stops ARC responding to memory
> backpressure.

See also https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=224080
(bugzialla 224080 ) about problems with zfs from head -r326347 .

bugzilla 224330 is another -r326347 problem report (based on
some list reports) but that are for problems in some non-zfs
contexts.

===
Mark Millard
markmi at dsl-only.net