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From: Chao Yu <chao@kernel.org>
To: Jaegeuk Kim <jaegeuk@kernel.org>,
	linux-kernel@vger.kernel.org,
	linux-f2fs-devel@lists.sourceforge.net
Cc: chao@kernel.org
Subject: Re: [f2fs-dev] [PATCH 2/2] f2fs: add a tracepoint to see large folio read submission
Date: Fri, 21 Nov 2025 18:23:20 +0800	[thread overview]
Message-ID: <db7ac308-dc34-4153-b44a-2b768b54cd4a@kernel.org> (raw)
In-Reply-To: <20251120235446.1947532-2-jaegeuk@kernel.org>

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 <jaegeuk@kernel.org>

Reviewed-by: Chao Yu <chao@kernel.org>

Thanks,

  reply	other threads:[~2025-11-21 10:23 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-11-20 23:54 [PATCH 1/2] f2fs: support large folio for immutable non-compressed case Jaegeuk Kim
2025-11-20 23:54 ` [PATCH 2/2] f2fs: add a tracepoint to see large folio read submission Jaegeuk Kim
2025-11-21 10:23   ` Chao Yu [this message]
2025-11-21 10:20 ` [f2fs-dev] [PATCH 1/2] f2fs: support large folio for immutable non-compressed case Chao Yu
2025-11-22  1:17   ` Jaegeuk Kim
2025-11-25  1:38     ` Chao Yu
2025-12-01 19:31   ` [f2fs-dev] [PATCH 1/2 v2] " Jaegeuk Kim
2025-12-01 21:37     ` Chao Yu
2025-12-01 22:30     ` [f2fs-dev] [PATCH 1/2 v3] " Jaegeuk Kim
2025-12-01 22:37       ` Chao Yu
2025-12-02  2:38       ` [f2fs-dev] [PATCH 1/2 v4] " Jaegeuk Kim
2025-12-02 18:07         ` Chao Yu
2025-12-09  8:32         ` Chao Yu
2025-12-09 18:38           ` Jaegeuk Kim
2026-01-01 11:20             ` Nanzhe Zhao
2026-01-02  6:23               ` Jaegeuk Kim
2026-01-03 10:54                 ` Nanzhe Zhao
2026-01-04  3:20                   ` Jaegeuk Kim
2025-11-22  1:18 ` [PATCH 1/2 v2] " Jaegeuk Kim
2025-12-16 19:20 ` [f2fs-dev] [PATCH 1/2] " patchwork-bot+f2fs

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