Date: Wed, 8 Feb 2023 08:33:48 -0500 From: Paul Mather <paul@gromit.dlib.vt.edu> To: Andrea Venturoli <ml@netfence.it> Cc: User Questions <freebsd-questions@freebsd.org> Subject: Re: Current swap configuration: best practices? Message-ID: <99898374-C698-4077-B52F-54CE547267B8@gromit.dlib.vt.edu> In-Reply-To: <5cdc2ef0-33e2-9465-0e65-6589b62e4256@netfence.it> References: <5cd5040b-d6c9-7c5f-9eae-e7e8a098eaca@chezmarcotte.ca> <5cdc2ef0-33e2-9465-0e65-6589b62e4256@netfence.it>
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On Feb 8, 2023, at 7:07 AM, Andrea Venturoli <ml@netfence.it> wrote: > On 2/7/23 19:48, Derek (freebsd lists) wrote: > >> Using ZFS: >> * enabling mirror swap will break crash dumps > > Ugh! > Why so? Any pointer? > I've got several gmirror-based swap partitions: these boxes did not crash in a long time, but I'd expect a coredump, should that happen... > Any way to test this, instead of waiting for it to happen? I also have gmirror-based swap partitions set up and have not had problems with crash dumps being generated after kernel panics. There is a special note in the gmirror(8) man page on setting up crash dumps. It's near the end of the man page (on my 13-STABLE system), and begins with the sentence, "Doing kernel dumps to gmirror providers is possible, but some conditions have to be met." Cheers, Paul.
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