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Sat, 04 Jan 2025 09:27:47 -0800 (PST) List-Id: Technical discussions relating to FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-hackers List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-hackers@FreeBSD.org MIME-Version: 1.0 References: In-Reply-To: From: Joe Schaefer Date: Sat, 4 Jan 2025 12:27:36 -0500 Message-ID: Subject: Re: curious crashes when under memory pressure To: Chris Torek Cc: "Peter 'PMc' Much" , freebsd-hackers@freebsd.org Content-Type: multipart/alternative; boundary="000000000000c270bd062ae4b613" X-Rspamd-Queue-Id: 4YQS7m2Y6Pz4nNG X-Spamd-Bar: --- X-Spamd-Result: default: False [-4.00 / 15.00]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_SHORT(-1.00)[-1.000]; NEURAL_HAM_MEDIUM(-1.00)[-0.999]; DMARC_POLICY_ALLOW(-0.50)[gmail.com,none]; R_SPF_ALLOW(-0.20)[+ip6:2607:f8b0:4000::/36]; R_DKIM_ALLOW(-0.20)[gmail.com:s=20230601]; MIME_GOOD(-0.10)[multipart/alternative,text/plain]; FREEMAIL_TO(0.00)[gmail.com]; RCVD_TLS_LAST(0.00)[]; ARC_NA(0.00)[]; MIME_TRACE(0.00)[0:+,1:+,2:~]; FREEMAIL_ENVFROM(0.00)[gmail.com]; DKIM_TRACE(0.00)[gmail.com:+]; FREEMAIL_FROM(0.00)[gmail.com]; TO_DN_SOME(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; FROM_HAS_DN(0.00)[]; DWL_DNSWL_NONE(0.00)[gmail.com:dkim]; PREVIOUSLY_DELIVERED(0.00)[freebsd-hackers@freebsd.org]; TO_MATCH_ENVRCPT_SOME(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; MISSING_XM_UA(0.00)[]; MID_RHS_MATCH_FROMTLD(0.00)[]; TAGGED_RCPT(0.00)[]; MLMMJ_DEST(0.00)[freebsd-hackers@freebsd.org]; RCVD_COUNT_ONE(0.00)[1]; ASN(0.00)[asn:15169, ipnet:2607:f8b0::/32, country:US]; RCVD_IN_DNSWL_NONE(0.00)[2607:f8b0:4864:20::b2b:from] --000000000000c270bd062ae4b613 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Intel and AMD cores are now heterogeneous compute engines. The idea that it is useful to beat the crap of every core simultaneously for an extended period of time is a really dumb idea for capacity testing now. On Sat, Jan 4, 2025 at 11:27=E2=80=AFAM Chris Torek = wrote: > On Sat, Jan 4, 2025 at 7:01=E2=80=AFAM Peter 'PMc' Much > wrote: > >> I'm swapping to a zfs mirror > > > > Well, You shouldn't do that. > > Why not? Swapping to a *file* on zfs has obvious issues, but swapping > to a mirrored swap partition seems like it should be entirely safe. A > bit slow (double writes) but I spent $ on RAM rather than M.2 drives > on the theory that I can add those later as needed. > > Chris > > --000000000000c270bd062ae4b613 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Intel and AMD cores are now heterogeneous compute engines= . The idea that it is useful to beat the crap of every core simultaneously = for an extended period of time is a really dumb idea for capacity testing n= ow.

On Sat, Jan 4, 2025 at 11:27=E2=80=AFAM Chris= Torek <chris.torek@gmail.com> wrote:
On Sat, Jan 4, 2025 a= t 7:01=E2=80=AFAM Peter 'PMc' Much
<pmc@ci= tylink.dinoex.sub.org> wrote:
>> I'm swapping to a zfs mirror
>
> Well, You shouldn't do that.

Why not? Swapping to a *file* on zfs has obvious issues, but swapping
to a mirrored swap partition seems like it should be entirely safe. A
bit slow (double writes) but I spent $ on RAM rather than M.2 drives
on the theory that I can add those later as needed.

Chris

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