Date: Wed, 18 Jul 2018 22:39:23 -0700 From: Mark Millard <marklmi@yahoo.com> To: John Kennedy <warlock@phouka.net> Cc: bob prohaska <fbsd@www.zefox.net>, freebsd-arm@freebsd.org Subject: Re: RPI3 swap experiments Message-ID: <1E5AF7B2-0025-4FE4-9718-FDA7BA10797A@yahoo.com> In-Reply-To: <20180719035305.GB92843@phouka1.phouka.net> References: <c6b8842a-fcc5-8e11-5a03-ba76eb3c5dea@sentry.org> <20180629233937.GC35717@www.zefox.net> <0f137e06-214a-3e8c-a216-f061ec04ac2c@sentry.org> <20180630005145.GA43801@www.zefox.net> <6f3406e2-71f3-d0c2-2b65-703e1a1d3c25@sentry.org> <8e92b2b7-da61-3efb-7231-9fac76b2c1d4@sentry.org> <ba33d8a7-a849-3893-8016-0765ebe1c51f@sentry.org> <2deaaec3-f78f-0b09-5ca7-27e14c6979f9@sentry.org> <20180704004554.GA61273@www.zefox.net> <20180718060650.GA24566@www.zefox.net> <20180719035305.GB92843@phouka1.phouka.net>
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On 2018-Jul-18, at 8:53 PM, John Kennedy <warlock at phouka.net> wrote: > On Tue, Jul 17, 2018 at 11:06:50PM -0700, bob prohaska wrote: >> It appears that some progress has been made in getting swap working = reasonably >> on the RPI3. A -j4 buildworld attempt running r336356 to compile = 336431 failed >> with "out of swap" but the worst read and write delays were less than = 5 seconds, >> a marked improvement over previous examples. >>=20 >> In this case swap was split, 2 each 1GB partitions on USB flash plus = 1 GB on the=20 >> microSD card. Previous attempts using 3 each 1 GB partitions on USB = flash have been >> repeatedly successful, while a single attempt using 3 each 1GB = partitions on microSD >> failed. >=20 > So I've got a RPI3B+. YMMV. >=20 > I've recompiled 12 ~7 times since June 27th and run into a handful of > problems but haven't had issues lately. I think I started out with = the > stock images (*-RPI3-20180618-r335317 and *-RPI3-20180709-r336134). >=20 > I had OOM problems, so added swap (typical swap-on-ufs). Could only = get > ~3.6G of swap without triggering the kern.maxswzone warning, and then = had the > pauses (forget the exact text, but basically FreeBSD telling me that = something > disk related had timed out after ~20 secs). That stopped being a = problem as > I took the stock images and created a real freebsd-swap partition (and = maybe > a SDCARD upgrade). See bugzilla 206048 ( = https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D206048 ) for what tends to happen with swap files (including swap in ufs files). = The technical/FreeBSD-internal material is in or referenced-in Comments 7 & = 8. This issue is separate from what Bob P. has been dealing with for swap partitions. > . . . =3D=3D=3D Mark Millard marklmi at yahoo.com ( dsl-only.net went away in early 2018-Mar)
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