Date: Tue, 8 Jun 2021 16:41:58 +0200 From: Gary Jennejohn <gljennjohn@gmail.com> To: Warner Losh <imp@bsdimp.com> Cc: Mark Johnston <markj@freebsd.org>, FreeBSD Current <freebsd-current@freebsd.org>, Edward Tomasz =?ISO-8859-1?Q?Napiera=3Fa?= <trasz@freebsd.org> Subject: Re: kernel panic while copying files Message-ID: <20210608144158.542d03be@ernst.home> In-Reply-To: <CANCZdfpPjNn7%2BAT%2BOzkAGks1a52z9EX7-_49tJLLd0bweMF%2BaQ@mail.gmail.com> References: <20210607090109.08ecb130@ernst.home> <YL6Hc6XmEIIx76gt@nuc> <20210608084646.6a7e1bc7@ernst.home> <CANCZdfpODXLP9B%2BAAXSd5dTS4-V_9r%2BEg90z7sz18wTaE8ELZA@mail.gmail.com> <CANCZdfpPjNn7%2BAT%2BOzkAGks1a52z9EX7-_49tJLLd0bweMF%2BaQ@mail.gmail.com>
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On Tue, 8 Jun 2021 06:48:19 -0600 Warner Losh <imp@bsdimp.com> wrote: > Sorry to reply to myself... had a thought as my brain rested while making > tea... > > I think we may need to consider reverting (or at least not yet enabling) > the uma stuff. > I tested and enabled the UMA CCB stuff immediately after trasz had committed it. I was able to copy files panic-free over USB until recently AFAICR. I also have had the kern.cam.ada.enable_uma_ccbs=1 set since then and have never seen a problem there. Only with USB. I'll try booting a new kernel with the uma_ccb sysctl's set to 0 and see what happens. BTW I now have a kernel compiled with -O0 ready to test. [snip lots of extraneous stuff] -- Gary Jennejohn
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