Date: Tue, 8 Jun 2021 09:46:47 -0600 From: Warner Losh <imp@bsdimp.com> To: Gary Jennejohn <gljennjohn@gmail.com> Cc: Mark Johnston <markj@freebsd.org>, FreeBSD Current <freebsd-current@freebsd.org>, "Edward Tomasz Napiera?a" <trasz@freebsd.org> Subject: Re: kernel panic while copying files Message-ID: <CANCZdfo=6P5ONKBH8Xr81M8rWOX3vo8w1ZeEya291ihRA8e9%2Bg@mail.gmail.com> In-Reply-To: <20210608144158.542d03be@ernst.home> 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> <20210608144158.542d03be@ernst.home>
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--0000000000007b270105c44311ea Content-Type: text/plain; charset="UTF-8" On Tue, Jun 8, 2021 at 8:42 AM Gary Jennejohn <gljennjohn@gmail.com> wrote: > 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. > Yes. This specific bug only affects SCSI. And it only affects it when there's an error that requires a restart. I've not yet had the time to do an audit for where else the copying is done... > 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. > Great! Warner --0000000000007b270105c44311ea--
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