From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id C4D90C4345F for ; Sat, 13 Apr 2024 04:43:13 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id EF1A56B007B; Sat, 13 Apr 2024 00:43:12 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id EA2A86B0082; Sat, 13 Apr 2024 00:43:12 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id D6AA26B0083; Sat, 13 Apr 2024 00:43:12 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id B9BCC6B007B for ; Sat, 13 Apr 2024 00:43:12 -0400 (EDT) Received: from smtpin30.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay06.hostedemail.com (Postfix) with ESMTP id F3166A1E9D for ; Sat, 13 Apr 2024 04:43:11 +0000 (UTC) X-FDA: 82003264182.30.2310B04 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf19.hostedemail.com (Postfix) with ESMTP id 998C01A0004 for ; Sat, 13 Apr 2024 04:43:09 +0000 (UTC) Authentication-Results: imf19.hostedemail.com; dkim=pass header.d=infradead.org header.s=casper.20170209 header.b=Cr2+k1TM; spf=none (imf19.hostedemail.com: domain of willy@infradead.org has no SPF policy when checking 90.155.50.34) smtp.mailfrom=willy@infradead.org; dmarc=none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1712983390; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=UdCdCc4OOaJHmySLIXZx/NfTkh4B4k7wpkuGCGoPgMs=; b=6hgXjmttqEGxpXfsnsPJ/fyOQ1OAhH9TYbiHVL0yv58LWe+48V2q5pVROPttOh5/m0+6TN QmfNqNr1ZaycBZ+MnQV8ZiqnxSTU+bOgPFX28r5G4BrsoxOO1+eWTBFDJeCJe3Sm0Nsq/U fm6y8wJ/5g6OOHOF18HKgnib1w36n5s= ARC-Authentication-Results: i=1; imf19.hostedemail.com; dkim=pass header.d=infradead.org header.s=casper.20170209 header.b=Cr2+k1TM; spf=none (imf19.hostedemail.com: domain of willy@infradead.org has no SPF policy when checking 90.155.50.34) smtp.mailfrom=willy@infradead.org; dmarc=none ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1712983390; a=rsa-sha256; cv=none; b=0Yby68TPd1HOMXvmoEugf+4g4P0hDaYAw+Cd3P5o9P70J6sTllA61FxmHvKFekIanFmw3v MiM0hBxqVR0+3A099d2bhg/XKEPikL1k38WpTWgqd0AIq3JyNzdFyW8397B823eQOI6YT3 QRBABRPRoc+bwIH2SgNE+rA8GnRyt20= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=UdCdCc4OOaJHmySLIXZx/NfTkh4B4k7wpkuGCGoPgMs=; b=Cr2+k1TMd9cRKjOcosXxijg5w7 CDj1lngz9KM8Vcu91/2IuW+VCPJ3LpkLbgyJvBw+2UH8zn5eIaPmY8eqArYC8QU244SNdzk7dQkl3 ES1r23pvRXJO3scDuwjTzmgOtt1Vyd55Z+rV+z86vDvWeXhV4A7+ecfPpZPBd5xD23oinrUPEnMaA KMwUmuG+SeHLhdphBWSV/vLAQblvbQx+mf6iUKIe4x6k3woTkEgCLxSruiEV+d1WeZSEQ0fvGk5O2 vx0UfSwQPv1mm1sZAOm/ElHfYi2rlpRxXyVCbl2/DwEE6Vz02UHRSR986hDK7CsI/d7gfBcXvP1i+ M8EjXN2g==; Received: from willy by casper.infradead.org with local (Exim 4.97.1 #2 (Red Hat Linux)) id 1rvVEH-0000000AkBH-0uz4; Sat, 13 Apr 2024 04:43:05 +0000 Date: Sat, 13 Apr 2024 05:43:05 +0100 From: Matthew Wilcox To: Vlastimil Babka Cc: Jianfeng Wang , "Christoph Lameter (Ampere)" , linux-mm@kvack.org, linux-kernel@vger.kernel.org, penberg@kernel.org, rientjes@google.com, iamjoonsoo.kim@lge.com, akpm@linux-foundation.org, junxiao.bi@oracle.com Subject: Re: [External] : Re: [PATCH] slub: limit number of slabs to scan in count_partial() Message-ID: References: <20240411164023.99368-1-jianfeng.w.wang@oracle.com> <38ef26aa-169b-48ad-81ad-8378e7a38f25@suse.cz> <1207c5d7-8bb7-4574-b811-0cd5f7eaf33d@suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1207c5d7-8bb7-4574-b811-0cd5f7eaf33d@suse.cz> X-Rspamd-Queue-Id: 998C01A0004 X-Rspam-User: X-Stat-Signature: bzbdes9bdp3rrf6mmmh753em79cm5mt8 X-Rspamd-Server: rspam01 X-HE-Tag: 1712983389-833499 X-HE-Meta: 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 2btQkX9B z0u/1Aa15Dh2XML4G3k3TQ8nXy2lpvgwF1jyyXeQEHcsMZJnemfpX9llCq9GpiOR/DWwds7AORjFQ2fqX5NHx3vEVPOl+UyUBg7UWPtPqPJzfGnWfQZzHN/do2pfJGDKs69db9zLxlAuLpfsVy0jQp/I0wuo1pGlFaDdEzz6Ti8VCW86Ekkr1YWyA2Cj5NUaKuxRSDDSRY74o1oylHtw9QgNeih97cdlPu5YWUp3Ik3FTAiIywwImpN+2GVxFm7huHHLG73TC7qvdYmdtpJth1Emlz0XTKsNy7nKxTbPcK0FxsGnENlcLBQDWCZ1pu642ExcX X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Fri, Apr 12, 2024 at 10:20:48PM +0200, Vlastimil Babka wrote: > On 4/12/24 7:29 PM, Jianfeng Wang wrote: > > Yes. > > On a server with one NUMA node, I create a case that uses many dentry objects. > > Could you describe in more detail how do you make dentry cache to grow such > a large partial slabs list? Thanks. I don't know precisely which (customer) problem Jianfeng is looking at, but here's one we got to publish a couple of years ago: https://lore.kernel.org/linux-fsdevel/3a7abaca-e20f-ad59-f6f0-caedd8450f9f@oracle.com/ (is LSFMM coming up? Must be time to have that discussion again!) https://lwn.net/Articles/894098/