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 6C845C433F5 for ; Sun, 8 May 2022 16:45:10 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id AEAE96B0072; Sun, 8 May 2022 12:45:09 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id A99E66B0073; Sun, 8 May 2022 12:45:09 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 988EA6B0074; Sun, 8 May 2022 12:45:09 -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 893DA6B0072 for ; Sun, 8 May 2022 12:45:09 -0400 (EDT) Received: from smtpin10.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay07.hostedemail.com (Postfix) with ESMTP id 60B5020D23 for ; Sun, 8 May 2022 16:45:09 +0000 (UTC) X-FDA: 79443150738.10.D4133F4 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf07.hostedemail.com (Postfix) with ESMTP id 2F08440028 for ; Sun, 8 May 2022 16:45:03 +0000 (UTC) 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=y8ghZT+NmFxYBiVpUw6Bi71blCh8zW2iKN+PbwKuq9s=; b=Qe3c5i9yjGfXK8qv+GlCS+lcCI zNXfOfvBNWlybFN9h7Avz08KGeZFg2AkLgpwD8cOzhdNWiG5c/J/nLhcsomh2Z8oGKm+bIQ5sqX3F pkh4gPrT/6dhHOylhsl8iSXluDlaB1SVH7rEpp3rujElhZxDlI06Y5t2b2hI2AnQOZW3Zc7WB1R5h XDmk5KpnP+6RtQbmfRtVmLEHjs7uANoP27Scgs6nz509tnzZNjKugaAcYJ4Sq74ArzH8qiRUyAuqF asTntfjBNOaVS6JJmMHf2qvxiUAfPkQ1Rx2g3HjjGOfsQ2OB+KLVVtaZOyRT2ykLFnmAwScfq48Qy ublG50Bw==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1nnk1f-002f3N-Iw; Sun, 08 May 2022 16:44:55 +0000 Date: Sun, 8 May 2022 17:44:55 +0100 From: Matthew Wilcox To: "Song, Xiongwei" Cc: "phillip@squashfs.org.uk" , "linux-mm@kvack.org" , "squashfs-devel@lists.sourceforge.net" , Hsin-Yi Wang Subject: Re: squashfs performance regression and readahea Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Authentication-Results: imf07.hostedemail.com; dkim=pass header.d=infradead.org header.s=casper.20170209 header.b=Qe3c5i9y; dmarc=none; spf=none (imf07.hostedemail.com: domain of willy@infradead.org has no SPF policy when checking 90.155.50.34) smtp.mailfrom=willy@infradead.org X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 2F08440028 X-Rspam-User: X-Stat-Signature: rfgcydfsiqht9stm6817j53fsmkq74pe X-HE-Tag: 1652028303-863639 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: On Sun, May 08, 2022 at 02:46:40PM +0000, Song, Xiongwei wrote: > I am facing a performance regression on squashfs. There are many squashfs > partitions on our board. I am doing the operations below on 90 squashfs > partitions: Hi Xiongwei. Thanks for the report. Hsin-Ye and I have been working on this problem off-list. Hsin-Ye, could you send the latest version?