lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

exofs: groups support

Browse Source 
* _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>
This commit is contained in:
Boaz Harrosh
2010-02-11 13:01:39 +02:00
parent b367e78bd1
commit 50a76fd3c3
3 changed files with 140 additions and 36 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
fs/exofs/exofs.h
View File

@ -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;