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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6A646C433F5 for ; Thu, 4 Nov 2021 12:03:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4ACF261073 for ; Thu, 4 Nov 2021 12:03:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231381AbhKDMGN (ORCPT ); Thu, 4 Nov 2021 08:06:13 -0400 Received: from nautica.notk.org ([91.121.71.147]:34255 "EHLO nautica.notk.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229505AbhKDMGM (ORCPT ); Thu, 4 Nov 2021 08:06:12 -0400 Received: by nautica.notk.org (Postfix, from userid 108) id 94EECC01B; Thu, 4 Nov 2021 13:03:33 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=codewreck.org; s=2; t=1636027413; bh=xEp8eFxtEqQ43xgpMlcvKwbaMDG5dHvhWTnvg8NkLBw=; h=From:To:Cc:Subject:Date:From; b=DBioh2kBx6je4xU5+OgqXNFWzSjw79Xsx0zjPANwMBeA2Ng2KvVEf62E3GRbKHMYn aZgPaHFw/JJxOUfwpqdhrSJTEg7KC0K3tarzpjrwU9W9u//kTXKR6+wJ5IabYj9c05 KFHm87wASIlDv+SNer4blwYIbBudpRnRYKGwiIngpQnyq0+xxToiXCBrL9dc66JGFI OeLCuZpUifIGL7IfkG8bt+L/BLT4YsXDdpR6HdBnuT/qydd7HfoNLwz1rTSQhD09ft s3q4Pc0GCiyEHq5sRz7h6Tq+Mu6BJrGEBEJBbrYSMyugLkaA8PxHpXnlaSTmBKqnMg d6igRQkCvyg3w== Received: from odin.codewreck.org (localhost [127.0.0.1]) by nautica.notk.org (Postfix) with ESMTPS id 2F842C009; Thu, 4 Nov 2021 13:03:30 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=codewreck.org; s=2; t=1636027412; bh=xEp8eFxtEqQ43xgpMlcvKwbaMDG5dHvhWTnvg8NkLBw=; h=From:To:Cc:Subject:Date:From; b=HiYHZzGwd0llRNmCIWnxzCGSuip8RAMEY2pKPvXvtE+nHShoQBGO5TKng2Ls+KWhA nj10x0d4LTLtGvpn819JD3JVlB6OXovKoZAUCueEY784x168gwJPX/mU2YIBO37MDb d8WOarI02Pb2G7lS6AgAOzAbU0lLss1aoxNh6r6rBA6Ph+2sN5Nrm6Ci9GJQ9QnH0X z0bmYtkRiZkcscOOwXx/n5eurvXu3kIptQaCxY9UwPFW4dcIqPeDjhnCNGTcDmwqJy ygqbmWKT5KyA8aXhbwyf6zRej+Hsi6w+goOCNv4oxN7QWNfor3poDIBcYLp4pBbM9t /HNuxPGK59LGg== Received: from localhost (odin.codewreck.org [local]) by odin.codewreck.org (OpenSMTPD) with ESMTPA id ffda33dd; Thu, 4 Nov 2021 12:03:27 +0000 (UTC) From: Dominique Martinet To: v9fs-developer@lists.sourceforge.net Cc: linux-kernel@vger.kernel.org, Latchesar Ionkov , Eric Van Hensbergen , Dominique Martinet Subject: [PATCH] 9p: set readahead and io size according to maxsize Date: Thu, 4 Nov 2021 21:03:23 +0900 Message-Id: <20211104120323.2189376-1-asmadeus@codewreck.org> X-Mailer: git-send-email 2.32.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org having a readahead of 128k with a msize of 128k (with overhead) lead to reading 124+4k everytime, making two roundtrips needlessly. tune readahead according to msize when cache is enabled for better performance Signed-off-by: Dominique Martinet --- fs/9p/vfs_super.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c index c6028af51925..b0632f4e337f 100644 --- a/fs/9p/vfs_super.c +++ b/fs/9p/vfs_super.c @@ -79,6 +79,9 @@ v9fs_fill_super(struct super_block *sb, struct v9fs_session_info *v9ses, if (!v9ses->cache) { sb->s_bdi->ra_pages = 0; sb->s_bdi->io_pages = 0; + } else { + sb->s_bdi->ra_pages = v9ses->maxdata >> PAGE_SHIFT; + sb->s_bdi->io_pages = v9ses->maxdata >> PAGE_SHIFT; } sb->s_flags |= SB_ACTIVE | SB_DIRSYNC; -- 2.31.1