Btrfs: CPU usage optimizations in push and the extent_map code

Signed-off-by: Chris Mason <chris.mason@oracle.com>

Btrfs: Fix read/write_extent_buffer to use KM_USER1 instead of KM_USER0

This avoids recursive use of KM_USER0 during btrfs_file_write

Signed-off-by: Chris Mason <chris.mason@oracle.com>

Btrfs: Fix bi_end_io() functions on > 2.6.23 kernels

It now returns void and it is never called for partial completions, so
the bio->bi_size check must go.

Signed-off-by: Chris Mason <chris.mason@o

Btrfs: Fix bi_end_io() functions on > 2.6.23 kernels

It now returns void and it is never called for partial completions, so
the bio->bi_size check must go.

Signed-off-by: Chris Mason <chris.mason@oracle.com>

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btrfs: 32-bit type problems

An assorted set of casts to get rid of the warnings on 32-bit archs.

Signed-off-by: Chris Mason <chris.mason@oracle.com>

Btrfs: Add back file data checksumming

Signed-off-by: Chris Mason <chris.mason@oracle.com>

Btrfs: Add back metadata checksumming

Signed-off-by: Chris Mason <chris.mason@oracle.com>

Btrfs: extent_map optimizations to cut down on CPU usage

Signed-off-by: Chris Mason <chris.mason@oracle.com>

Btrfs: Add an extent buffer LRU to reduce radix tree hits

Signed-off-by: Chris Mason <chris.mason@oracle.com>

Btrfs: Fix allocation routines to avoid intermixing data and metadata allocations

Signed-off-by: Chris Mason <chris.mason@oracle.com>

Btrfs: Use an array of pages in the extent buffers to reduce the cost of find_get_page

Signed-off-by: Chris Mason <chris.mason@oracle.com>

Btrfs: Cache extent buffer mappings

Signed-off-by: Chris Mason <chris.mason@oracle.com>

Btrfs: Allow tree blocks larger than the page size

Signed-off-by: Chris Mason <chris.mason@oracle.com>

Btrfs: Change the remaining radix trees used by extent-tree.c to extent_map trees

Signed-off-by: Chris Mason <chris.mason@oracle.com>

Btrfs: Stop using radix trees for the block group cache

Signed-off-by: Chris Mason <chris.mason@oracle.com>

Btrfs: Fix extent_buffer and extent_state leaks

Signed-off-by: Chris Mason <chris.mason@oracle.com>

Btrfs: Go back to kmaps instead of page_address in extent_buffers

Signed-off-by: Chris Mason <chris.mason@oracle.com>

Btrfs: Avoid memcpy where possible in extent_buffers

Signed-off-by: Chris Mason <chris.mason@oracle.com>

Btrfs: Optimizations for the extent_buffer code

Signed-off-by: Chris Mason <chris.mason@oracle.com>

Btrfs: Create extent_buffer interface for large blocksizes

Signed-off-by: Chris Mason <chris.mason@oracle.com>

Btrfs: factor page private preparations into a helper

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

Btrfs: [PATCH] extent_map: add writepage_end_io hook

XFS updates the ondisk inode size only after the data I/O has finished,
so it needs a hook when the writepage end_bio handler has finished.

Migh

Btrfs: [PATCH] extent_map: add writepage_end_io hook

XFS updates the ondisk inode size only after the data I/O has finished,
so it needs a hook when the writepage end_bio handler has finished.

Might not be worth applying as-is as the per-page callback is very
ineffcient. What XFS really wants is a callback when writeout of a
whole extent has completed. This delayed i_size updates scheme might
be worthwile for btrfs aswell, btw.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

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Btrfs: [PATCH] extent_map: make the writepage_io hook optional

The writepage_io is not mandatory, e.g. my port of xfs to the extent_map
code does not have one for now. So handle a NULL pointer grac

Btrfs: [PATCH] extent_map: make the writepage_io hook optional

The writepage_io is not mandatory, e.g. my port of xfs to the extent_map
code does not have one for now. So handle a NULL pointer gracefully
here.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

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Btrfs: [PATCH] extent_map: provide generic bmap

generic_bmap is completely trivial, while the extent to bh mapping in
btrfs is rather complex. So provide a extent_bmap instead that takes
a get_exte

Btrfs: [PATCH] extent_map: provide generic bmap

generic_bmap is completely trivial, while the extent to bh mapping in
btrfs is rather complex. So provide a extent_bmap instead that takes
a get_extent callback and can be used by filesystem using the extent_map
code.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

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Btrfs: [PATCH] extent_map: fix locking for bio completion

The bio completion handlers can be run in any context, e.g. when using
the old ide driver they run in hardirq context with irqs disabled so

Btrfs: [PATCH] extent_map: fix locking for bio completion

The bio completion handlers can be run in any context, e.g. when using
the old ide driver they run in hardirq context with irqs disabled so
lockdep rightfully warns about using write_lock_irq useage in these
handlers.

This patch switches clear_extent_bit and set_extent_bit to
write_lock_irqsave to fix this problem.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

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Btrfs: Reorder tests in set_extent_bit to properly find holes

Yan Zheng noticed that set_extent_bit was exiting too early when there
was a hole in the map. The fix is to reorder the tests to check

Btrfs: Reorder tests in set_extent_bit to properly find holes

Yan Zheng noticed that set_extent_bit was exiting too early when there
was a hole in the map. The fix is to reorder the tests to check for the
hole first.

Signed-off-by: Chris Mason <chris.mason@oracle.com>

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