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| author | Boaz Harrosh <bharrosh@panasas.com> | 2010-02-11 12:01:39 +0100 |
|---|---|---|
| committer | Boaz Harrosh <bharrosh@panasas.com> | 2010-02-28 12:55:53 +0100 |
| commit | 50a76fd3c352ed2740eba01512efcfceee0703be (patch) | |
| tree | 425416e068648e225b41327a120d00bbddd16d0e /fs/exofs/exofs.h | |
| parent | exofs: Prepare for groups (diff) | |
| download | linux-50a76fd3c352ed2740eba01512efcfceee0703be.tar.xz linux-50a76fd3c352ed2740eba01512efcfceee0703be.zip | |
exofs: groups support
* _calc_stripe_info() changes to accommodate for grouping
calculations. Returns additional information
* old _prepare_pages() becomes _prepare_one_group()
which stores pages belonging to one device group.
* New _prepare_for_striping iterates on all groups calling
_prepare_one_group().
* Enable mounting of groups data_maps (group_width != 0)
[QUESTION]
what is faster A or B;
A. x += stride;
x = x % width + first_x;
B x += stride
if (x < last_x)
x = first_x;
Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
Diffstat (limited to 'fs/exofs/exofs.h')
| -rw-r--r-- | fs/exofs/exofs.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/exofs/exofs.h b/fs/exofs/exofs.h index acfebd36de83..59b8bf2825c7 100644 --- a/fs/exofs/exofs.h +++ b/fs/exofs/exofs.h @@ -63,6 +63,8 @@ struct exofs_layout { unsigned mirrors_p1; unsigned group_width; + u64 group_depth; + unsigned group_count; enum exofs_inode_layout_gen_functions lay_func; @@ -132,6 +134,7 @@ struct exofs_io_state { struct page **pages; unsigned nr_pages; unsigned pgbase; + unsigned pages_consumed; /* Attributes */ unsigned in_attr_len; |