From owner-freebsd-stable@freebsd.org Tue Feb 12 18:03:55 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 C92BC14EEDA3 for ; Tue, 12 Feb 2019 18:03:55 +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 7C72B71899; Tue, 12 Feb 2019 18:03:54 +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 x1CI3iHc072646 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 12 Feb 2019 19:03:45 +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 x1CI3hkM052505 (version=TLSv1.2 cipher=DHE-RSA-AES128-SHA bits=128 verify=NOT); Wed, 13 Feb 2019 01:03:43 +0700 (+07) (envelope-from eugen@grosbein.net) Subject: Re: 11.2-STABLE kernel wired memory leak To: Mark Johnston References: <20190212163446.GA29847@raichu> Cc: FreeBSD stable , kib@freebsd.org From: Eugene Grosbein Message-ID: <4ab1331f-80e3-b856-b402-9985e73618bc@grosbein.net> Date: Wed, 13 Feb 2019 01:03:37 +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: <20190212163446.GA29847@raichu> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 8bit 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: 7C72B71899 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 [-3.93 / 15.00]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-0.999,0]; MX_INVALID(0.50)[cached]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; TO_DN_SOME(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_GOOD(-0.10)[text/plain]; DMARC_NA(0.00)[grosbein.net]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; RCVD_COUNT_THREE(0.00)[3]; IP_SCORE(-1.40)[ip: (-2.36), ipnet: 2a01:4f8::/29(-2.40), asn: 24940(-2.23), country: DE(-0.01)]; R_SPF_PERMFAIL(0.00)[]; NEURAL_HAM_SHORT(-0.93)[-0.929,0]; 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 18:03:56 -0000 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: $ sed 's/:/,/' vmstat-z.txt | awk -F, '{printf "%10s %s\n", $2*$5/1024/1024, $1}' | sort -k1,1 -rn | head 1892 abd_chunk 454.629 dnode_t 351.35 zio_buf_512 228.391 zio_buf_16384 173.968 dmu_buf_impl_t 130.25 zio_data_buf_131072 93.6887 VNODE 81.6978 arc_buf_hdr_t_full 74.9368 256 57.4102 4096