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Date: Sun, 07 Oct 2012 05:06:06 +0900 From: Jaegeuk Kim <jaegeuk.kim@...il.com> To: Vyacheslav Dubeyko <slava@...eyko.com> Cc: jaegeuk.kim@...sung.com, Al Viro <viro@...iv.linux.org.uk>, tytso@....edu, gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org, chur.lee@...sung.com, cm224.lee@...sung.com, jooyoung.hwang@...sung.com, linux-fsdevel@...r.kernel.org Subject: Re: [PATCH 00/16] f2fs: introduce flash-friendly file system 2012-10-06 (토), 17:54 +0400, Vyacheslav Dubeyko: > Hi Jaegeuk, Hi. We know each other, right? :) > > > From: 김재극 <jaegeuk.kim@...sung.com> > > To: viro@...iv.linux.org.uk, 'Theodore Ts'o' <tytso@....edu>, gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org, chur.lee@...sung.com, cm224.lee@...sung.com, jaegeuk.kim@...sung.com, jooyoung.hwang@...sung.com > > Subject: [PATCH 00/16] f2fs: introduce flash-friendly file system > > Date: Fri, 05 Oct 2012 20:55:07 +0900 > > > > This is a new patch set for the f2fs file system. > > > > What is F2FS? > > ============= > > > > NAND flash memory-based storage devices, such as SSD, eMMC, and SD cards, have > > been widely being used for ranging from mobile to server systems. Since they are > > known to have different characteristics from the conventional rotational disks, > > a file system, an upper layer to the storage device, should adapt to the changes > > from the sketch. > > > > F2FS is a new file system carefully designed for the NAND flash memory-based storage > > devices. We chose a log structure file system approach, but we tried to adapt it > > to the new form of storage. Also we remedy some known issues of the very old log > > structured file system, such as snowball effect of wandering tree and high cleaning > > overhead. > > > > Because a NAND-based storage device shows different characteristics according to > > its internal geometry or flash memory management scheme aka FTL, we add various > > parameters not only for configuring on-disk layout, but also for selecting allocation > > and cleaning algorithms. > > > > What about F2FS performance? Could you share benchmarking results of the new file system? > > It is very interesting the case of aged file system. How is GC's implementation efficient? Could you share benchmarking results for the very aged file system state? > Although I have benchmark results, currently I'd like to see the results measured by community as a black-box. As you know, the results are very dependent on the workloads and parameters, so I think it would be better to see other results for a while. Thanks, > With the best regards, > Vyacheslav Dubeyko. > > > Patch set > > ========= > > > > The patch #1 adds a document to Documentation/filesystems/. > > The patch #2 adds a header file of on-disk layout to include/linux/. > > The patches #3-#15 adds f2fs source files to fs/f2fs/. > > The Last patch, patch #16, updates Makefile and Kconfig. > > > > mkfs.f2fs > > ========= > > > > The file system formatting tool, "mkfs.f2fs", is available from the following > > download page: > > http://sourceforge.net/projects/f2fs-tools/ > > > > > > Usage > > ===== > > > > If you'd like to experience f2fs, simply: > > # mkfs.f2fs /dev/sdb1 > > # mount -t f2fs /dev/sdb1 /mnt/f2fs > > > > Short log > > ========= > > > > Jaegeuk Kim (16): > > f2fs: add document > > f2fs: add on-disk layout > > f2fs: add superblock and major in-memory structure > > f2fs: add super block operations > > f2fs: add checkpoint operations > > f2fs: add node operations > > f2fs: add segment operations > > f2fs: add file operations > > f2fs: add address space operations for data > > f2fs: add core inode operations > > f2fs: add inode operations for special inodes > > f2fs: add core directory operations > > f2fs: add xattr and acl functionalities > > f2fs: add garbage collection functions > > f2fs: add recovery routines for roll-forward > > f2fs: update Kconfig and Makefile > > > > Documentation/filesystems/00-INDEX | 2 + > > Documentation/filesystems/f2fs.txt | 314 +++++++ > > fs/Kconfig | 1 + > > fs/Makefile | 1 + > > fs/f2fs/Kconfig | 55 ++ > > fs/f2fs/Makefile | 6 + > > fs/f2fs/acl.c | 402 ++++++++ > > fs/f2fs/acl.h | 57 ++ > > fs/f2fs/checkpoint.c | 791 ++++++++++++++++ > > fs/f2fs/data.c | 700 ++++++++++++++ > > fs/f2fs/dir.c | 657 +++++++++++++ > > fs/f2fs/f2fs.h | 981 ++++++++++++++++++++ > > fs/f2fs/file.c | 643 +++++++++++++ > > fs/f2fs/gc.c | 1140 +++++++++++++++++++++++ > > fs/f2fs/gc.h | 203 +++++ > > fs/f2fs/hash.c | 98 ++ > > fs/f2fs/inode.c | 258 ++++++ > > fs/f2fs/namei.c | 549 +++++++++++ > > fs/f2fs/node.c | 1773 ++++++++++++++++++++++++++++++++++++ > > fs/f2fs/node.h | 331 +++++++ > > fs/f2fs/recovery.c | 372 ++++++++ > > fs/f2fs/segment.c | 1755 +++++++++++++++++++++++++++++++++++ > > fs/f2fs/segment.h | 627 +++++++++++++ > > fs/f2fs/super.c | 550 +++++++++++ > > fs/f2fs/xattr.c | 387 ++++++++ > > fs/f2fs/xattr.h | 142 +++ > > include/linux/f2fs_fs.h | 359 ++++++++ > > 27 files changed, 13154 insertions(+) > > create mode 100644 Documentation/filesystems/f2fs.txt > > create mode 100644 fs/f2fs/Kconfig > > create mode 100644 fs/f2fs/Makefile > > create mode 100644 fs/f2fs/acl.c > > create mode 100644 fs/f2fs/acl.h > > create mode 100644 fs/f2fs/checkpoint.c > > create mode 100644 fs/f2fs/data.c > > create mode 100644 fs/f2fs/dir.c > > create mode 100644 fs/f2fs/f2fs.h > > create mode 100644 fs/f2fs/file.c > > create mode 100644 fs/f2fs/gc.c > > create mode 100644 fs/f2fs/gc.h > > create mode 100644 fs/f2fs/hash.c > > create mode 100644 fs/f2fs/inode.c > > create mode 100644 fs/f2fs/namei.c > > create mode 100644 fs/f2fs/node.c > > create mode 100644 fs/f2fs/node.h > > create mode 100644 fs/f2fs/recovery.c > > create mode 100644 fs/f2fs/segment.c > > create mode 100644 fs/f2fs/segment.h > > create mode 100644 fs/f2fs/super.c > > create mode 100644 fs/f2fs/xattr.c > > create mode 100644 fs/f2fs/xattr.h > > create mode 100644 include/linux/f2fs_fs.h > > > > -- > > 1.7.9.5 > > > > > > > > > > --- > > Jaegeuk Kim > > Samsung > > > > > > > > -- > > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > > the body of a message to majordomo@...r.kernel.org > > More majordomo info at > > http://vger.kernel.org/majordomo-info.html > > > > Please read the FAQ at http://www.tux.org/lkml/ > > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@...r.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ -- Jaegeuk Kim Samsung -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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