Date: Fri, 09 Mar 2018 13:44:30 -0700 From: Ian Lepore <ian@freebsd.org> To: bob prohaska <fbsd@www.zefox.net>, freebsd-arm@freebsd.org Subject: Re: Garbled console output on Pi3 Message-ID: <1520628270.84937.56.camel@freebsd.org> In-Reply-To: <20180307182117.GA55819@www.zefox.net> References: <20180307182117.GA55819@www.zefox.net>
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On Wed, 2018-03-07 at 10:21 -0800, bob prohaska wrote: > From time to time I observe garbled console output on a Pi3 running -current. > The present revision is > FreeBSD 12.0-CURRENT (ZEFOX) #1 r330571: Wed Mar 7 00:58:23 PST 2018 > but I don't think that's special; the same thing has shown up sporadically > for the past month or so. > > The output looks like this: > > Mar 7 09:53:53 www kernel: pid 44970 (llvm-tblgen), uid 0, was killed: out of swap space > sswawpa_spp_apgaegr:er iw:ndsaewap fii_ppnand_ieptge fiweaanrig:eti r:teb u wfiifannidt deefebr:i fnbuiiuffontife tberwajit:e : bu0f, bufeblfokb nj:r:o: 0,w2 b b22u3fo94aibj,tl: k b0nosui:,z fe b1siz87erlk6:n, o:sbi 4zue: : 202f901o669b604, > ej0sw: : > r:ag le4,0paap9 g6_epb > inrkd: inendefifnioini:te t w1eai35t bu w2fai6t0f b,er:uf fbufoerbj: :bufo bjs0:i , z0bl, blkeknno: 2: o16: 4260191,52 > 9393s7ize:, 1siz63e:84 4 > 096 > swap_pager: indefinite wait buffer: bufobj: 0, blkno: 210573, size: 4096 > > The first and last lines look normal, which seems to rule out errors in > the serial link. I can't come up with a reason for this. This was normal in the old days, but console output is buffered these days, and the buffer size is 128 bytes on arm[64], so if things are going to interleave it should be in chunks of 128, not a few chars at a time like that. Oh... unless it's a case of userland and the kernel writing to the terminal at the same time, independently of each other. Were you running the commands that are failing from the console? -- Ian
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