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[69.158.183.252]) by smtp.gmail.com with ESMTPSA id 70sm1754748qkj.48.2019.11.07.12.32.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 07 Nov 2019 12:32:25 -0800 (PST) Sender: Mark Johnston Date: Thu, 7 Nov 2019 15:32:23 -0500 From: Mark Johnston To: Steve Kargl Cc: freebsd-current@freebsd.org Subject: Re: unkillable process consuming 100% cpu Message-ID: <20191107203223.GF16978@raichu> References: <20191107202919.GA4565@troutmask.apl.washington.edu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20191107202919.GA4565@troutmask.apl.washington.edu> User-Agent: Mutt/1.12.2 (2019-09-21) X-Rspamd-Queue-Id: 478FSq289gz4Hph X-Spamd-Bar: ---- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=gmail.com header.s=20161025 header.b=UqHxLre/; dmarc=none; spf=pass (mx1.freebsd.org: domain of markjdb@gmail.com designates 2607:f8b0:4864:20::833 as permitted sender) smtp.mailfrom=markjdb@gmail.com X-Spamd-Result: default: False [-4.43 / 15.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; R_DKIM_ALLOW(-0.20)[gmail.com:s=20161025]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; R_SPF_ALLOW(-0.20)[+ip6:2607:f8b0:4000::/36]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-current@freebsd.org]; DMARC_NA(0.00)[freebsd.org]; RCVD_COUNT_THREE(0.00)[3]; MIME_TRACE(0.00)[0:+]; TO_MATCH_ENVRCPT_SOME(0.00)[]; DKIM_TRACE(0.00)[gmail.com:+]; RCPT_COUNT_TWO(0.00)[2]; RCVD_IN_DNSWL_NONE(0.00)[3.3.8.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.0.4.6.8.4.0.b.8.f.7.0.6.2.list.dnswl.org : 127.0.5.0]; IP_SCORE(-2.73)[ip: (-9.25), ipnet: 2607:f8b0::/32(-2.35), asn: 15169(-2.01), country: US(-0.05)]; FORGED_SENDER(0.30)[markj@freebsd.org,markjdb@gmail.com]; MID_RHS_NOT_FQDN(0.50)[]; FREEMAIL_ENVFROM(0.00)[gmail.com]; ASN(0.00)[asn:15169, ipnet:2607:f8b0::/32, country:US]; FROM_NEQ_ENVFROM(0.00)[markj@freebsd.org,markjdb@gmail.com]; RCVD_TLS_ALL(0.00)[] X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 07 Nov 2019 20:32:28 -0000 On Thu, Nov 07, 2019 at 12:29:19PM -0800, Steve Kargl wrote: > I haven't seen anyone post about an unkillable process > (even by root), which consumes 100% cpu. > > last pid: 4592; load averages: 1.24, 1.08, 0.74 up 13+20:21:20 12:26:29 > 68 processes: 2 running, 66 sleeping > CPU: 0.1% user, 0.0% nice, 12.6% system, 0.0% interrupt, 87.2% idle > Mem: 428M Active, 11G Inact, 138M Laundry, 2497M Wired, 1525M Buf, 2377M Free > Swap: 16G Total, 24M Used, 16G Free > > PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND > 69092 kargl 2 45 0 342M 148M CPU2 2 12:51 100.07% chrome > > > Neither of these have an effect. > > kill -1 69092 > kill -9 69069 > > Attempts to attach gdb831 to -p 69092 leads to hung xterm. Could you please show us the output of "procstat -kk 69092"?