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author | Mingming Cao <cmm@us.ibm.com> | 2006-03-26 13:37:59 +0400 |
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committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-26 20:57:01 +0400 |
commit | d48589bfad0e60bff0aa3f9e4875983f607bd44b (patch) | |
tree | 3ec6d645847ea451b15abd6c9f1f27ce93591fd9 /fs/ocfs2/journal.c | |
parent | faa569763a7753e0a7cb8fd3919a62c0f7cc1e3c (diff) | |
download | linux-d48589bfad0e60bff0aa3f9e4875983f607bd44b.tar.xz |
[PATCH] ext3_get_blocks: Adjust reservation window size for mblocks
Optimize the block reservation and the multiple block allocation: with the
knowledge of the total number of blocks ahead, set or adjust the reservation
window size properly (based on the number of blocks needed) before block
allocation happens: if there isn't any reservation yet, make sure the
reservation window equals to or greater than the number of blocks needed,
before create an reservation window; if a reservation window is already
exists, try to extends the window size to match the number of blocks to
allocate. This could increase the possibility of completing multiple blocks
allocation in a single request, as blocks are only allocated in the range of
the inode's reservation window.
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/ocfs2/journal.c')
0 files changed, 0 insertions, 0 deletions