From owner-freebsd-stable@freebsd.org Tue Feb 12 18:40:24 2019 Return-Path: Delivered-To: freebsd-stable@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 3ED5214F0974 for ; Tue, 12 Feb 2019 18:40:24 +0000 (UTC) (envelope-from eugen@grosbein.net) Received: from hz.grosbein.net (hz.grosbein.net [IPv6:2a01:4f8:d12:604::2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "hz.grosbein.net", Issuer "hz.grosbein.net" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 475F1742DD; Tue, 12 Feb 2019 18:40:23 +0000 (UTC) (envelope-from eugen@grosbein.net) Received: from eg.sd.rdtc.ru (eg.sd.rdtc.ru [IPv6:2a03:3100:c:13:0:0:0:5]) by hz.grosbein.net (8.15.2/8.15.2) with ESMTPS id x1CIeDc2072942 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 12 Feb 2019 19:40:13 +0100 (CET) (envelope-from eugen@grosbein.net) X-Envelope-From: eugen@grosbein.net X-Envelope-To: markj@freebsd.org Received: from [10.58.0.4] ([10.58.0.4]) by eg.sd.rdtc.ru (8.15.2/8.15.2) with ESMTPS id x1CIeCHj052923 (version=TLSv1.2 cipher=DHE-RSA-AES128-SHA bits=128 verify=NOT); Wed, 13 Feb 2019 01:40:12 +0700 (+07) (envelope-from eugen@grosbein.net) Subject: Re: 11.2-STABLE kernel wired memory leak To: Mark Johnston References: <20190212163446.GA29847@raichu> <4ab1331f-80e3-b856-b402-9985e73618bc@grosbein.net> <20190212181805.GB29847@raichu> Cc: FreeBSD stable From: Eugene Grosbein Message-ID: <973d9dc6-8dd4-8cdf-b279-f5c9483da884@grosbein.net> Date: Wed, 13 Feb 2019 01:40:06 +0700 User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0 MIME-Version: 1.0 In-Reply-To: <20190212181805.GB29847@raichu> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=0.3 required=5.0 tests=BAYES_00,LOCAL_FROM,SPF_PASS autolearn=no autolearn_force=no version=3.4.2 X-Spam-Report: * -2.3 BAYES_00 BODY: Bayes spam probability is 0 to 1% * [score: 0.0000] * -0.0 SPF_PASS SPF: sender matches SPF record * 2.6 LOCAL_FROM From my domains X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on hz.grosbein.net X-Rspamd-Queue-Id: 475F1742DD X-Spamd-Bar: --- Authentication-Results: mx1.freebsd.org; spf=permerror (mx1.freebsd.org: domain of eugen@grosbein.net uses mechanism not recognized by this client) smtp.mailfrom=eugen@grosbein.net X-Spamd-Result: default: False [-3.92 / 15.00]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-0.999,0]; MX_INVALID(0.50)[cached]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; MIME_GOOD(-0.10)[text/plain]; DMARC_NA(0.00)[grosbein.net]; RCVD_COUNT_THREE(0.00)[3]; IP_SCORE(-1.39)[ip: (-2.31), ipnet: 2a01:4f8::/29(-2.40), asn: 24940(-2.24), country: DE(-0.01)]; TO_DN_ALL(0.00)[]; R_SPF_PERMFAIL(0.00)[]; RCPT_COUNT_TWO(0.00)[2]; NEURAL_HAM_SHORT(-0.93)[-0.933,0]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:24940, ipnet:2a01:4f8::/29, country:DE]; MID_RHS_MATCH_FROM(0.00)[]; RCVD_TLS_ALL(0.00)[] X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 12 Feb 2019 18:40:24 -0000 13.02.2019 1:18, Mark Johnston wrote: > On Wed, Feb 13, 2019 at 01:03:37AM +0700, Eugene Grosbein wrote: >> 12.02.2019 23:34, Mark Johnston wrote: >> >>> I suspect that the "leaked" memory is simply being used to cache UMA >>> items. Note that the values in the FREE column of vmstat -z output are >>> quite large. The cached items are reclaimed only when the page daemon >>> wakes up to reclaim memory; if there are no memory shortages, large >>> amounts of memory may accumulate in UMA caches. In this case, the sum >>> of the product of columns 2 and 5 gives a total of roughly 4GB cached. >>> >>>> as well as "sysctl hw": http://www.grosbein.net/freebsd/leak/sysctl-hw.txt >>>> and "sysctl vm": http://www.grosbein.net/freebsd/leak/sysctl-vm.txt >> >> It seems page daemon is broken somehow as it did not reclaim several gigs of wired memory >> despite of long period of vm thrashing: > > Depending on the system's workload, it is possible for the caches to > grow quite quickly after a reclaim. If you are able to run kgdb on the > kernel, you can find the time of the last reclaim by comparing the > values of lowmem_uptime and time_uptime. Yes, I have debugger compiled into running kernel and have console access. What commands should I use?