linux-yocto-4.8 - Linux 4.8 Embedded Kernel

Age	Commit message (Collapse)	Author
2007-07-14	[XFS] Concurrent Multi-File Data Streams	David Chinner
	In media spaces, video is often stored in a frame-per-file format. When dealing with uncompressed realtime HD video streams in this format, it is crucial that files do not get fragmented and that multiple files a placed contiguously on disk. When multiple streams are being ingested and played out at the same time, it is critical that the filesystem does not cross the streams and interleave them together as this creates seek and readahead cache miss latency and prevents both ingest and playout from meeting frame rate targets. This patch set creates a "stream of files" concept into the allocator to place all the data from a single stream contiguously on disk so that RAID array readahead can be used effectively. Each additional stream gets placed in different allocation groups within the filesystem, thereby ensuring that we don't cross any streams. When an AG fills up, we select a new AG for the stream that is not in use. The core of the functionality is the stream tracking - each inode that we create in a directory needs to be associated with the directories' stream. Hence every time we create a file, we look up the directories' stream object and associate the new file with that object. Once we have a stream object for a file, we use the AG that the stream object point to for allocations. If we can't allocate in that AG (e.g. it is full) we move the entire stream to another AG. Other inodes in the same stream are moved to the new AG on their next allocation (i.e. lazy update). Stream objects are kept in a cache and hold a reference on the inode. Hence the inode cannot be reclaimed while there is an outstanding stream reference. This means that on unlink we need to remove the stream association and we also need to flush all the associations on certain events that want to reclaim all unreferenced inodes (e.g. filesystem freeze). SGI-PV: 964469 SGI-Modid: xfs-linux-melb:xfs-kern:29096a Signed-off-by: David Chinner <dgc@sgi.com> Signed-off-by: Barry Naujok <bnaujok@sgi.com> Signed-off-by: Donald Douwsma <donaldd@sgi.com> Signed-off-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Tim Shimmin <tes@sgi.com> Signed-off-by: Vlad Apostolov <vapo@sgi.com>
2006-11-11	[XFS] 956618: Linux crashes on boot with XFS-DMAPI filesystem when	Vlad Apostolov
	CONFIG_XFS_TRACE is on SGI-PV: 956618 SGI-Modid: xfs-linux-melb:xfs-kern:27196a Signed-off-by: Vlad Apostolov <vapo@sgi.com> Signed-off-by: Tim Shimmin <tes@sgi.com>
2006-09-29	[XFS] Remove v1 dir trace macro - missed in a past commit.	Tim Shimmin
	Signed-off-by: Tim Shimmin <tes@sgi.com>
2006-06-20	[XFS] Remove files from the build that are now unused.	Nathan Scott
	Signed-off-by: Nathan Scott <nathans@sgi.com>
2006-06-20	[XFS] Fix a Makefile issue related to exports.o handling.	Nathan Scott
	Signed-off-by: Nathan Scott <nathans@sgi.com>
2006-03-22	[XFS] Sync up one/two other minor changes missed in previous merges.	Nathan Scott
	Signed-off-by: Nathan Scott <nathans@sgi.com>
2005-11-03	[XFS] Cleanup cosmetic differences between source trees.	Nathan Scott
	Signed-off-by: Nathan Scott <nathans@sgi.com>
2005-09-09	[XFS] Revert recent quota Makefile change, not in a fit state for merging.	Nathan Scott
	Signed-off-by: Nathan Scott <nathans@sgi.com>
2005-09-08	[XFS] Fix modular XFS builds (Makefile botch).	Nathan Scott
	Signed-off-by: Nathan Scott <nathans@sgi.com>
2005-09-05	[XFS] Sort out some cosmetic differences between XFS trees.	Nathan Scott
	SGI-PV: 904196 SGI-Modid: xfs-linux-melb:xfs-kern:23719a Signed-off-by: Nathan Scott <nathans@sgi.com>