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 6378031DD8A for ; Fri, 21 Nov 2025 10:23:23 +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=1763720603; cv=none; b=M00ij45PCKLYaBs/lC/kfnuLIQSqYQfATtdZDumZpn0INWFgptzGBKhV7uznRaz5O/crJHqsntLzd+mu3Pye4JUuQFeq5SHuTmglYzvAsEdKtwvuAutqEtzzYaVC4e9X7eFVJJItccbw8naqaV+n9mzdcbmULlzS6fqa+aESg/w= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763720603; c=relaxed/simple; bh=htw0LBDETiJyiX2+ALuGnkgSCxegETSVFv+P/JA86ZI=; h=Message-ID:Date:MIME-Version:Cc:Subject:To:References:From: In-Reply-To:Content-Type; b=HAee/Uj3qARVN4FRyq8RskUgre7HfSSdz+8KcuC1Yj+pscDZ64Z794CUGeC99R8k8wLJZnTL+DBfhjR8DHAs9sa9XAolooVWbI41g1MNR3opRO/AEzn5/QdQmdqi5goqb4/PZTz3Qbvv817QdAcI1N/zO01r32brHMqNURlpGSk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=gBK2zSHB; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="gBK2zSHB" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D0E83C4CEF1; Fri, 21 Nov 2025 10:23:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1763720602; bh=htw0LBDETiJyiX2+ALuGnkgSCxegETSVFv+P/JA86ZI=; h=Date:Cc:Subject:To:References:From:In-Reply-To:From; b=gBK2zSHB5BpyKpiFk/H6hsxHvH/m77h9PKZAdF4zkyiT/kYt4tfv6/OwjJPGtr6em +qcO2tMg6zlvdB9ZMxNNPolXzM7z6fyvU8gVwv7kYEH3qLrtwQ2AZdSdAkl870Y77l J3OOmCPGAgDDcdEBar+ICz6+WL58yUzAkf3qwaM2fxaZmQU+6OOLjOT0yLWF7rXKQ2 3isFuou1ZVUo+iGXLkugxH2/myLjQYM8WtrHgCJx1RTclDhiQWNVmSmyAOf3QnHMfL fbWNKLmAsk4RrqDWA++MJ2nQIM6w+TJ9DlA+iOkkr+EvJQIDVH6vnHhcOR3wGIqsg3 NhsrwQcm/6+yg== Message-ID: Date: Fri, 21 Nov 2025 18:23:20 +0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Cc: chao@kernel.org Subject: Re: [f2fs-dev] [PATCH 2/2] f2fs: add a tracepoint to see large folio read submission To: Jaegeuk Kim , linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net References: <20251120235446.1947532-1-jaegeuk@kernel.org> <20251120235446.1947532-2-jaegeuk@kernel.org> Content-Language: en-US From: Chao Yu In-Reply-To: <20251120235446.1947532-2-jaegeuk@kernel.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 11/21/2025 7:54 AM, Jaegeuk Kim via Linux-f2fs-devel wrote: > For example, > > 1327.539878: f2fs_preload_pages_start: dev = (252,16), ino = 14, i_size = 4294967296 start: 0, end: 8191 > 1327.539878: page_cache_sync_ra: dev=252:16 ino=e index=0 req_count=8192 order=9 size=0 async_size=0 ra_pages=4096 mmap_miss=0 prev_pos=-1 > 1327.539879: page_cache_ra_order: dev=252:16 ino=e index=0 order=9 size=4096 async_size=2048 ra_pages=4096 > 1327.541895: f2fs_readpages: dev = (252,16), ino = 14, start = 0 nrpage = 4096 > 1327.541930: f2fs_lookup_extent_tree_start: dev = (252,16), ino = 14, pgofs = 0, type = Read > 1327.541931: f2fs_lookup_read_extent_tree_end: dev = (252,16), ino = 14, pgofs = 0, read_ext_info(fofs: 0, len: 1048576, blk: 4221440) > 1327.541931: f2fs_map_blocks: dev = (252,16), ino = 14, file offset = 0, start blkaddr = 0x406a00, len = 0x1000, flags = 2, seg_type = 8, may_create = 0, multidevice = 0, flag = 0, err = 0 > 1327.541989: f2fs_read_folio: dev = (252,16), ino = 14, DATA, FILE, index = 0, nr_pages = 512, dirty = 0, uptodate = 0 > 1327.542012: f2fs_read_folio: dev = (252,16), ino = 14, DATA, FILE, index = 512, nr_pages = 512, dirty = 0, uptodate = 0 > 1327.542036: f2fs_read_folio: dev = (252,16), ino = 14, DATA, FILE, index = 1024, nr_pages = 512, dirty = 0, uptodate = 0 > 1327.542080: f2fs_read_folio: dev = (252,16), ino = 14, DATA, FILE, index = 1536, nr_pages = 512, dirty = 0, uptodate = 0 > 1327.542127: f2fs_read_folio: dev = (252,16), ino = 14, DATA, FILE, index = 2048, nr_pages = 512, dirty = 0, uptodate = 0 > 1327.542151: f2fs_read_folio: dev = (252,16), ino = 14, DATA, FILE, index = 2560, nr_pages = 512, dirty = 0, uptodate = 0 > 1327.542196: f2fs_read_folio: dev = (252,16), ino = 14, DATA, FILE, index = 3072, nr_pages = 512, dirty = 0, uptodate = 0 > 1327.542219: f2fs_read_folio: dev = (252,16), ino = 14, DATA, FILE, index = 3584, nr_pages = 512, dirty = 0, uptodate = 0 > 1327.542239: f2fs_submit_read_bio: dev = (252,16)/(252,16), rw = READ(R), DATA, sector = 33771520, size = 16777216 > 1327.542269: page_cache_sync_ra: dev=252:16 ino=e index=4096 req_count=8192 order=9 size=4096 async_size=2048 ra_pages=4096 mmap_miss=0 prev_pos=-1 > 1327.542289: page_cache_ra_order: dev=252:16 ino=e index=4096 order=9 size=4096 async_size=2048 ra_pages=4096 > 1327.544485: f2fs_readpages: dev = (252,16), ino = 14, start = 4096 nrpage = 4096 > 1327.544521: f2fs_lookup_extent_tree_start: dev = (252,16), ino = 14, pgofs = 4096, type = Read > 1327.544521: f2fs_lookup_read_extent_tree_end: dev = (252,16), ino = 14, pgofs = 4096, read_ext_info(fofs: 0, len: 1048576, blk: 4221440) > 1327.544522: f2fs_map_blocks: dev = (252,16), ino = 14, file offset = 4096, start blkaddr = 0x407a00, len = 0x1000, flags = 2, seg_type = 8, may_create = 0, multidevice = 0, flag = 0, err = 0 > 1327.544550: f2fs_read_folio: dev = (252,16), ino = 14, DATA, FILE, index = 4096, nr_pages = 512, dirty = 0, uptodate = 0 > 1327.544575: f2fs_read_folio: dev = (252,16), ino = 14, DATA, FILE, index = 4608, nr_pages = 512, dirty = 0, uptodate = 0 > 1327.544601: f2fs_read_folio: dev = (252,16), ino = 14, DATA, FILE, index = 5120, nr_pages = 512, dirty = 0, uptodate = 0 > 1327.544647: f2fs_read_folio: dev = (252,16), ino = 14, DATA, FILE, index = 5632, nr_pages = 512, dirty = 0, uptodate = 0 > 1327.544692: f2fs_read_folio: dev = (252,16), ino = 14, DATA, FILE, index = 6144, nr_pages = 512, dirty = 0, uptodate = 0 > 1327.544734: f2fs_read_folio: dev = (252,16), ino = 14, DATA, FILE, index = 6656, nr_pages = 512, dirty = 0, uptodate = 0 > 1327.544777: f2fs_read_folio: dev = (252,16), ino = 14, DATA, FILE, index = 7168, nr_pages = 512, dirty = 0, uptodate = 0 > 1327.544805: f2fs_read_folio: dev = (252,16), ino = 14, DATA, FILE, index = 7680, nr_pages = 512, dirty = 0, uptodate = 0 > 1327.544826: f2fs_submit_read_bio: dev = (252,16)/(252,16), rw = READ(R), DATA, sector = 33804288, size = 16777216 > 1327.544852: f2fs_preload_pages_end: dev = (252,16), ino = 14, i_size = 4294967296 start: 8192, end: 8191 > > Signed-off-by: Jaegeuk Kim Reviewed-by: Chao Yu Thanks,