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path: root/fs/ext4/mballoc.h
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2009-03-27ext4: Rename pa_linear to pa_typeAneesh Kumar K.V
Impact: code cleanup This patch rename pa_linear to pa_type and add MB_INODE_PA and MB_GROUP_PA to indicate inode and group prealloc space. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Reviewed-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-02-06ext4: Remove stale block allocator references from ext4.hMike Snitzer
Remove some leftovers from when the old block allocator was removed (c2ea3fde). ext4_sb_info is now a bit lighter. Also remove a dangling read_block_bitmap() prototype. Signed-off-by: Mike Snitzer <snitzer@gmail.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-01-05ext4: Don't allow new groups to be added during block allocationAneesh Kumar K.V
After we mark the blocks in the buddy cache as allocated, we need to ensure that we don't reinit the buddy cache until the block bitmap is updated. This commit achieves this by holding the group_info alloc_semaphore till ext4_mb_release_context Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: stable@kernel.org
2009-01-05ext4: fix BUG when calling ext4_error with locked block groupAneesh Kumar K.V
The mballoc code likes to call ext4_error while it is holding locked block groups. This can causes a scheduling in atomic context BUG. We can't just unlock the block group and relock it after/if ext4_error returns since that might result in race conditions in the case where the filesystem is set to continue after finding errors. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-11-25ext4: cleanup mballoc header filesAneesh Kumar K.V
Move some of the forward declaration of the static functions to mballoc.c where they are used. This enables us to include mballoc.h in other .c files. Also correct the buddy cache documentation. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-01-05ext4: Use EXT4_GROUP_INFO_NEED_INIT_BIT during resizeAneesh Kumar K.V
The new groups added during resize are flagged as need_init group. Make sure we properly initialize these groups. When we have block size < page size and we are adding new groups the page may still be marked uptodate even though we haven't initialized the group. While forcing the init of buddy cache we need to make sure other groups part of the same page of buddy cache is not using the cache. group_info->alloc_sem is added to ensure the same. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> cc: stable@kernel.org
2008-10-16ext4: Replace hackish ext4_mb_poll_new_transaction with commit callbackTheodore Ts'o
The multiblock allocator needs to be able to release blocks (and issue a blkdev discard request) when the transaction which freed those blocks is committed. Previously this was done via a polling mechanism when blocks are allocated or freed. A much better way of doing things is to create a jbd2 callback function and attaching the list of blocks to be freed directly to the transaction structure. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-10-16ext4: let the block device know when unused blocks can be discardedTheodore Ts'o
Let the block device know when unused blocks can be discarded, using the new sb_issue_discard() interface. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-10-16ext4: Use an rbtree for tracking blocks freed during transaction.Aneesh Kumar K.V
With this patch we track the block freed during a transaction using red-black tree. We also make sure contiguous blocks freed are collected in one node in the tree. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2008-09-23ext4: move /proc setup and teardown out of mballoc.cTheodore Ts'o
...and into the core setup/teardown code in fs/ext4/super.c so that other parts of ext4 can define tuning parameters. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-07-23ext4: Don't allow lg prealloc list to be grow large.Aneesh Kumar K.V
Currently, the locality group prealloc list is freed only when there is a block allocation failure. This can result in large number of entries in the preallocation list making ext4_mb_use_preallocated() expensive. To fix this, we convert the locality group prealloc list to a hash list. The hash index is the order of number of blocks in the prealloc space with a max order of 9. When adding prealloc space to the list we make sure total entries for each order does not exceed 8. If it is more than 8 we discard few entries and make sure the we have only <= 5 entries. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2008-04-29ext4: Move mballoc headers/structures to a seperate header file mballoc.hMingming Cao
Move function and structure definiations out of mballoc.c and put it under a new header file mballoc.h Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>