From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 252A58494 for ; Fri, 26 Apr 2024 03:21:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714101682; cv=none; b=kJR73xdSNjlbkp06+zL/7CggkvojUYMvn1zM1c6jCAquCak7qW7SOEj7gEtXS5eUq23ABlLTzqGRNVb4N/y1DzLIIRp+rywZncTwYM93BQDEk6Og1k7+TvKpsDhir3zVt6ZVWL0Hf9iLquM1O4jp+QuBjJizcKEvjWRZcaMhh7g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714101682; c=relaxed/simple; bh=phcnORNHz0ykICAOAyxXYjlM1QRsE7DOcOBCuU7WqS0=; h=Date:To:From:Subject:Message-Id; b=Xc85QNngxvgWRWi7M7dH7FmlInzlp4fLy2X54KuqFJTaAY1rO/CMON69AFPlswAUUzJR1f+3H0ij0PlvCq4WwQbiW0pelfo2q7gh68jGEEbUx/WgvAkG47DJzGjaumidD4iVOObtWNyfi8GLb9ZJ8tY7hS1w3zw+Ob/uXpivoM8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=hjewM2Gx; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="hjewM2Gx" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E6AB2C113CD; Fri, 26 Apr 2024 03:21:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1714101682; bh=phcnORNHz0ykICAOAyxXYjlM1QRsE7DOcOBCuU7WqS0=; h=Date:To:From:Subject:From; b=hjewM2GxWDHlrQF1XkIlA98mOdlkYJmzQKLrHIckBWBPFACQUH7drUkyLapBaIHbJ lThLfoMTAmYGvWjnsIQ8JQRxo6Sg0NvbgPN0DpFpY69VtBN7DYDoxfeMQrtB6du9Fo 9TXwu9tmGCrZESaI8ShimZMKeTd264NBnELrLs2Q= Date: Thu, 25 Apr 2024 20:21:21 -0700 To: mm-commits@vger.kernel.org,willy@infradead.org,viro@ZenIV.linux.org.uk,tujinjiang@huawei.com,jack@suse.cz,brauner@kernel.org,liushixin2@huawei.com,akpm@linux-foundation.org From: Andrew Morton Subject: [folded-merged] mm-readahead-dont-decrease-mmap_miss-when-folio-has-workingset-flags-fix.patch removed from -mm tree Message-Id: <20240426032121.E6AB2C113CD@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The quilt patch titled Subject: mm/filemap: don't decrease mmap_miss when folio has workingset flag has been removed from the -mm tree. Its filename was mm-readahead-dont-decrease-mmap_miss-when-folio-has-workingset-flags-fix.patch This patch was dropped because it was folded into mm-readahead-dont-decrease-mmap_miss-when-folio-has-workingset-flags.patch ------------------------------------------------------ From: Liu Shixin Subject: mm/filemap: don't decrease mmap_miss when folio has workingset flag Date: Tue, 26 Mar 2024 14:50:26 +0800 add comments Link: https://lkml.kernel.org/r/20240326065026.1910584-1-liushixin2@huawei.com Signed-off-by: Liu Shixin Reviewed-by: Jan Kara Cc: Al Viro Cc: Christian Brauner Cc: Jinjiang Tu Cc: Matthew Wilcox (Oracle) Signed-off-by: Andrew Morton --- mm/filemap.c | 8 ++++++++ 1 file changed, 8 insertions(+) --- a/mm/filemap.c~mm-readahead-dont-decrease-mmap_miss-when-folio-has-workingset-flags-fix +++ a/mm/filemap.c @@ -3492,6 +3492,13 @@ static vm_fault_t filemap_map_folio_rang if (PageHWPoison(page + count)) goto skip; + /* + * If there are too many folios that are recently evicted + * in a file, they will probably continue to be evicted. + * In such situation, read-ahead is only a waste of IO. + * Don't decrease mmap_miss in this scenario to make sure + * we can stop read-ahead. + */ if (!folio_test_workingset(folio)) (*mmap_miss)++; @@ -3542,6 +3549,7 @@ static vm_fault_t filemap_map_order0_fol if (PageHWPoison(page)) return ret; + /* See comment of filemap_map_folio_range() */ if (!folio_test_workingset(folio)) (*mmap_miss)++; _ Patches currently in -mm which might be from liushixin2@huawei.com are mm-readahead-break-read-ahead-loop-if-filemap_add_folio-return-enomem.patch mm-readahead-dont-decrease-mmap_miss-when-folio-has-workingset-flags.patch