XFS status update for 2012 - Revision history

Hch at 00:11, 1 December 2012

2012-12-01T00:11:33Z

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	== XFS status update for October 2012		== XFS status update for October 2012 ==

	October saw the merge of the XFS development tree for Linux 3.7 into		October saw the merge of the XFS development tree for Linux 3.7 into

Hch: October update

2012-12-01T00:11:25Z

October update

← Older revision		Revision as of 00:11, 1 December 2012
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			== XFS status update for October 2012

			October saw the merge of the XFS development tree for Linux 3.7 into
			mainline as well as a few additional fixes for this new work.

			Linux 3.7 will be a fairly boring release as far as XFS is concerned,
			the biggest user visible changes are an intelligent implementation of
			the lseek SEEK_HOLE/SEEK_DATA calls, and finally the switch to use
			the inode64 allocator by default.

			The XFS development tree for Linux 3.8 started getting commits in
			October as well, most notably a large cleanup of the periodic sync
			code.

			On the user space side we saw release candidate for the next releases
			of the XFS tools. For xfsprogs the 3.1.9-rc1 release brings various
			fixes in xfs_repair, especially dealing with directories as well as
			various improvements in xfs_db and mkfs.xfs, three new commands for
			xfs_io and a few user visible fixes to xfs_quota. The xfsdump 3.1.1-rc1
			release adds a German string translation and support for 32-bit project
			IDs. xfstests saw its usual stream of fixes, but also a new ext4-specific
			test case and a switch to use the util-linux version of fstrim instead
			of a bundled one. All user space projects saw various improvements to
			the build system.

	== XFS status update for September 2012 ==		== XFS status update for September 2012 ==

Hch: September update

2012-10-30T21:46:06Z

September update

← Older revision		Revision as of 21:46, 30 October 2012
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			== XFS status update for September 2012 ==

			September saw the release of Linux 3.6 which included a slightly smaller
			than usual XFS update:

			51 files changed, 2607 insertions(+), 2455 deletions(-)

			The bulk of the changes in Linux 3.6 is made up by native support for
			discontinuous buffers, with various minor bug fixes and cleanups making up
			the rest. In the meantime the mailing list was busy with multiple revisions
			of the sync/unmount code rewrite, and the patch series to make the inode64
			mount option remountable and the default.

			On the user space side xfsprogs saw new support for the preadv, pwritev and
			sync_file_range system calls in xfs_io as well as minor fixes to libxcmd and
			mkfs.xfs, xfsdump grew support for dumping and restoring 32-bit project ids
			and and saw an update to the German translation. Xfstests saw a large number
			of fixes, and a single new test case.

	== XFS status update for August 2012 ==		== XFS status update for August 2012 ==

Hch: August update

2012-09-13T08:00:14Z

August update

← Older revision		Revision as of 08:00, 13 September 2012
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			== XFS status update for August 2012 ==

			After the release of Linux 3.5 in July, August saw the big XFS merge for
			the Linux 3.6 merge window. In the meantime the XFS tree has seen low
			activity, with refined support for SEEK_HOLE/SEEK_DATA that takes unwritten
			extents into account as the main feature. A couple of fixes also went in
			and mostly got back ported to mainline for Linux 3.5 as well.

			The mailing list had a lot of traffic about interesting updates that didn't
			make it into the tree yet, with the most interesting being: remount support
			for the inode64 option, a patch series allowing to trim back large
			preallocations when the filesystem is out of space, and a large rewrite
			of the XFS-internal sync code.

			On the user land side xfs_db saw a fix for a very long standing bug go into
			the tree and xfstests saw a few fixes. The mailing list list saw various other
			interesting updates including a German translation for the xfsdump messages,
			32-bit project ID support in xfsdump, a lot of xfstests updates including a
			patch to use the upstream util-linux version of fstrim in xfstests, support
			for tmpfs in xfstests, various ext3 and btrfs updates, but none of them
			made it into the git tree. There also was a lot of discussion of older
			patch to reorganize the xfstests source tree.

	== XFS status update for July 2012 ==		== XFS status update for July 2012 ==

Hch: /* XFS status update for July 2012 */

2012-08-13T09:14:26Z

XFS status update for July 2012

← Older revision		Revision as of 09:14, 13 August 2012
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	Userpace development has been rather slow with a single fix for xfs_db		Userpace development has been rather slow with a single fix for xfs_db
	and another single ~~fixe~~ in xfstests.		and another single fix in xfstests.

	== XFS status update for June 2012 ==		== XFS status update for June 2012 ==

Hch at 09:14, 13 August 2012

2012-08-13T09:14:11Z

← Older revision		Revision as of 09:14, 13 August 2012
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			== XFS status update for July 2012 ==

			July saw the release of Linux 3.5, which included an average sized XFS
			update:

			81 files changed, 2633 insertions(+), 3004 deletions(-)

			Noteworthy updates in Linux 3.5 include the removal of the xfsbufd
			background thread which writes metadata buffers, background processing
			of CIL flushes and thus lower average latency for metadata heavy
			workloads, as well a a reduction of lock hold times and frequency during
			reads and writes. The large XFS update for the Linux 3.6 merge window
			did not get merged yet by the end of July, but will bring better support
			for large directory block sizes, a faster inode allocator and a large
			amount of bug fixes in different areas of the code. Development on the list
			has been fairly busy on the patchsets to support group and project quotas
			at the same time, as well as improved SEEK_HOLE/SEEK_DATA support but
			otherwise mostly limited to bug fixes and smaller cleanups.

			Userpace development has been rather slow with a single fix for xfs_db
			and another single fixe in xfstests.

	== XFS status update for June 2012 ==		== XFS status update for June 2012 ==

Hch: June update

2012-07-24T13:39:59Z

June update

← Older revision		Revision as of 13:39, 24 July 2012
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			== XFS status update for June 2012 ==

			June has been a pretty slow month for XFS in Linus tree, as June saw
			the stabilization of the Linux 3.5 and thus only a handful of important
			XFS fixes. Development of the tree destined for the next merge window
			has been a bit more busy with the addition of discontinuous buffers that
			replace the dabuf layer which has performance issues and isn't easy to
			deal with in the upcoming metadata checksumming as well as a few smaller
			cleanups.

			The list saw various other patches not applied yet, most notable a
			refactoring and speedup of the inode allocator, and a heavily discussed
			rewrite of the mount option parsing.

			On the user space side a small number of fixes to the handling of fragmented
			directories were applied to xfs_repair, and xfstests saw a fix for handling
			different versions of xfsdump.

	== XFS status update for May 2012 ==		== XFS status update for May 2012 ==

Hch: /* XFS status update for May 2012 */

2012-06-18T12:06:13Z

XFS status update for May 2012

← Older revision		Revision as of 12:06, 18 June 2012
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	user space metadata I/O from log writeback, and last but not least the		user space metadata I/O from log writeback, and last but not least the
	addition of the SEEK_DATA/SEEK_HOLE lseek arguments that allow user space		addition of the SEEK_DATA/SEEK_HOLE lseek arguments that allow user space
	programs to deal with sparse files efficiently.		programs to deal with sparse files efficiently. Traffic on the mailing list has been a bit
			quiet in May, mostly focusing on a wide range of bug fixes, but little new features.

	~~Traffic on the mailing list has been a bit quite in May, mostly focusing~~
	~~on a wide range of bug fixes, but little new features.~~
	On the user space side xfs_repair saw a few bug fixes posted to the list		On the user space side xfs_repair saw a few bug fixes posted to the list
	that didn't make it to the repository yet, while xfstests saw it's usual		that didn't make it to the repository yet, while xfstests saw it's usual
	amount of minor bug fixes.		amount of minor bug fixes.


	== XFS status update for April 2012 ==		== XFS status update for April 2012 ==

Hch: May update

2012-06-18T12:05:13Z

May update

← Older revision		Revision as of 12:05, 18 June 2012
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			== XFS status update for May 2012 ==

			May saw the release of Linux 3.4, including a decent sized XFS update.
			Remarkable XFS features in Linux 3.4 include moving over all metadata
			updates to use transactions, the addition of a work queue for the
			low-level allocator code to avoid stack overflows due to extreme stack
			use in the Linux VM/VFS call chain, better xattr operation tracing,
			fixes for a long-standing but hard to hit deadlock when using the XFS
			real time subvolume, and big improvements in disk quota scalability.

			The final diffstat for XFS in Linux 3.4 is:

			61 files changed, 1692 insertions(+), 2356 deletions(-)

			In the meantime the merge window for Linux 3.5 opened, and another large
			update has been merged into Linus' tree. Interesting changes in Linux
			3.5-rc1 include improved error handling on buffer write failures,
			a drastic reduction of locking overhead when doing high-IOPS direct I/O,
			removal of the old xfsbufd daemon in favor of writing most run-time
			metadata from the xfsaild daemon, deferral of CIL pushes to decouple
			user space metadata I/O from log writeback, and last but not least the
			addition of the SEEK_DATA/SEEK_HOLE lseek arguments that allow user space
			programs to deal with sparse files efficiently.

			Traffic on the mailing list has been a bit quite in May, mostly focusing
			on a wide range of bug fixes, but little new features.
			On the user space side xfs_repair saw a few bug fixes posted to the list
			that didn't make it to the repository yet, while xfstests saw it's usual
			amount of minor bug fixes.


	== XFS status update for April 2012 ==		== XFS status update for April 2012 ==

Hch: march and april updates

2012-05-08T15:34:00Z

march and april updates

← Older revision		Revision as of 15:34, 8 May 2012
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			== XFS status update for April 2012 ==

			April was a relatively quite month in XFS development, partially because
			most XFS developers traveled to San Francisco for the Linux Filesystem
			and Storage Summit and the first XFS developers meeting co hosted at the
			Linux Foundation Collaboration Summit.

			The XFS development tree only saw a series to reduce ilock hold times and
			a few patches merged. Traffic on the mailing list list has been a bit more
			busy, with a few patchset being reposted again and again after various
			updates. Features still scheduled for Linux 3.5 include: removal of
			the xfsbufd daemon, various other cleanups of the buffer layer, moving
			CIL commits into a background thread and thus reducing the impact on
			threads causing the commits, as well as a bigger than usual set of
			cleanups and fixes.

			The user space side as been extremely slow with no patches applied and
			very few posted to the mailing list.


			== XFS status update for March 2012 ==

			March saw the release of Linux 3.3, which saw an XFS update slightly smaller
			than usual, and consisting largely of code removal and cleanups, with the
			only user visible change being the removal of the old logging code, and thus
			the "nodelaylog" mount option. This is reflected in a diffstat with more
			than twice as many deletions as additions:

			45 files changed, 954 insertions(+), 2182 deletions(-)

			After that Linux 3.4 merge window opened, and a big XFS updates was merged
			into mainline, again removing a lot more code than adding it. The
			highlight are quota changes to make in-memory quota caching a lot faster
			and more scalable, as well as changes to log all metadata updates on a
			live XFS filesystem, thus finishing the consolidation of all metadata I/O
			code pathes to just after many years of hard work.

			Development for the Linux 3.5 merge window also were in full steam,
			including a series to kill the xfsbufd daemon in favour of on-stack
			delayed buffer writeback lists.

			On the user space side we finally saw the long awaited xfsprogs 3.1.8
			and xfsdump 3.1.0 releases. The new xfsprogs release features a larger
			number of repair fixes and speedups, as well as smaller updates to the
			other tools. All users are recommended to upgrade to this version.
			Major updates in xfsdump 3.1.0 is support for dumping multiple I/O
			streams in parallel, a new dump format to support all 32 bits of the
			inode generation number, removal of support for the old SGI_XFSDUMP_SKIP_FILE
			extended attribute, as well as various smaller fixes.

			Development of xfstests included at its normal pace, with a few new
			test cases for xfsdump, as well as various fixes for existing test cases
			and the addition of a new "dangerous" group to skip tests that potentially
			crash the system if an too old kernel is used.


	== XFS status update for February 2012 ==		== XFS status update for February 2012 ==