kernel/git/stable/linux.git/fs/gfs2/bmap.c, branch linux-3.5.y

GFS2: Eliminate unused "new" parameter to gfs2_meta_indirect_buffer

2012-05-11T09:19:23+00:00

It turns out that the "new" parameter to function gfs2_meta_indirect_buffer was always being passed in as zero. Therefore, this patch eliminates it and simplifies the function. Signed-off-by: Bob Peterson Signed-off-by: Steven Whitehouse

GFS2: Use variable rather than qa to determine if unstuff necessary

2012-04-24T15:44:33+00:00

In the future, the qadata structure will be eliminated and merged back in with the block reservation structure, after we extend the lifespan of that. This patch is a step forward in eliminating the qadata structure. It adds a variable to the do_grow function to determine when unstuffing is necessary, and has been done. Signed-off-by: Bob Peterson Signed-off-by: Steven Whitehouse

GFS2: Make sure rindex is uptodate before starting transactions

2012-04-05T09:20:10+00:00

This patch removes the call from gfs2_blk2rgrd to function gfs2_rindex_update and replaces it with individual calls. The former way turned out to be too problematic. Signed-off-by: Bob Peterson Signed-off-by: Steven Whitehouse

GFS2: Change truncate page allocation to be GFP_NOFS

2012-03-20T11:05:00+00:00

This patch changes the page allocation in gfs2_block_truncate_page and two others to GFP_NOFS to avoid deadlock in low-memory conditions. Signed-off-by: Bob Peterson Signed-off-by: Steven Whitehouse

GFS2: decouple quota allocations from block allocations

2011-11-22T10:25:21+00:00

This patch separates the code pertaining to allocations into two parts: quota-related information and block reservations. This patch also moves all the block reservation structure allocations to function gfs2_inplace_reserve to simplify the code, and moves the frees to function gfs2_inplace_release. Signed-off-by: Bob Peterson Signed-off-by: Steven Whitehouse

GFS2: move toward a generic multi-block allocator

2011-11-21T10:04:09+00:00

This patch is a revision of the one I previously posted. I tried to integrate all the suggestions Steve gave. The purpose of the patch is to change function gfs2_alloc_block (allocate either a dinode block or an extent of data blocks) to a more generic gfs2_alloc_blocks function that can allocate both a dinode _and_ an extent of data blocks in the same call. This will ultimately help us create a multi-block reservation scheme to reduce file fragmentation. This patch moves more toward a generic multi-block allocator that takes a pointer to the number of data blocks to allocate, plus whether or not to allocate a dinode. In theory, it could be called to allocate (1) a single dinode block, (2) a group of one or more data blocks, or (3) a dinode plus several data blocks. Signed-off-by: Bob Peterson Signed-off-by: Steven Whitehouse

GFS2: combine gfs2_alloc_block and gfs2_alloc_di

2011-11-15T15:25:03+00:00

GFS2 functions gfs2_alloc_block and gfs2_alloc_di do basically the same things, with a few exceptions. This patch combines the two functions into a slightly more generic gfs2_alloc_block. Having one centralized block allocation function will reduce code redundancy and make it easier to implement multi-block reservations to reduce file fragmentation in the future. Signed-off-by: Bob Peterson Signed-off-by: Steven Whitehouse

GFS2: More automated code analysis fixes

2011-11-08T14:04:20+00:00

A potentially uninitialised variable, some unreachable code, and the main part of this, fixing the error path in the unlink function. Signed-off-by: Steven Whitehouse

GFS2: Move readahead of metadata during deallocation into its own function

2011-10-21T11:39:54+00:00

Move the recently added readahead of the indirect pointer tree during deallocation into its own function in order that we can use it elsewhere in the future. Also this fixes the resetting of the "first" variable in the original patch. Signed-off-by: Steven Whitehouse

GFS2: rewrite fallocate code to write blocks directly

2011-10-21T11:39:49+00:00

GFS2's fallocate code currently goes through the page cache. Since it's only writing to the end of the file or to holes in it, it doesn't need to, and it was causing issues on low memory environments. This patch pulls in some of Steve's block allocation work, and uses it to simply allocate the blocks for the file, and zero them out at allocation time. It provides a slight performance increase, and it dramatically simplifies the code. Signed-off-by: Benjamin Marzinski Signed-off-by: Steven Whitehouse