Date: Fri, 27 Sep 2019 15:21:14 -0400 From: mike tancsa <mike@sentex.net> To: Oleksandr Rybalko <ray@ddteam.net> Cc: freebsd-embedded <freebsd-embedded@freebsd.org> Subject: Re: watchdogd stat location Message-ID: <83831ae6-9275-4f0c-a23d-c9cca3dc28f4@sentex.net> In-Reply-To: <CAJ1Oi8FsG=nEBXdd0CS3U2zZSgh=SMcBO0ieY-KT5b1iDVFmJg@mail.gmail.com> References: <5eba25eb-9ba4-0c93-27c8-e834491298ad@sentex.net> <CANCZdfp6bym5b6eFXFH0MxjYsAX%2B1Bi9fGXgp7sFM206zmsveQ@mail.gmail.com> <CAJ1Oi8FsG=nEBXdd0CS3U2zZSgh=SMcBO0ieY-KT5b1iDVFmJg@mail.gmail.com>
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On 9/27/2019 3:19 PM, Oleksandr Rybalko wrote: > > пт, 27 вер. 2019 о 19:22 Warner Losh <imp@bsdimp.com > <mailto:imp@bsdimp.com>> пише: > > On Fri, Sep 27, 2019 at 9:36 AM mike tancsa <mike@sentex.net > <mailto:mike@sentex.net>> wrote: > > > We sometimes run into an issue where our embedded devices that > boot off > > a read only SD card, hang with a controller error. Its not clear if > > this is a BIOS/firmware/SDCard or driver bug issue. Its pretty > > infrequent, but annoying enough that I started to dig to see why > the box > > is not rebooting via the hardware watchdog. It seems to fail > to reboot > > the box as the stat that it does on the filesystem is off the md > backed > > /etc which is not impacted. I know I could run an external > program, but > > would it be safer to change the default directory where the stat > is done > > to something that is generally not mounted via ramdisk ? > > > Why not just stat "/". > > I think embedded devices may have monolithic kernel w/o any loadable > modules and book config. > I am all for that too. Just something other than /etc or /var which are often mounted on ramdisk. ---Mike
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