diff options
| author | NeilBrown <neilb@suse.de> | 2008-10-13 04:55:12 +0400 |
|---|---|---|
| committer | NeilBrown <neilb@suse.de> | 2008-10-13 04:55:12 +0400 |
| commit | 4bbf3771ca40d0aaec8316d0e7476b16010288e5 (patch) | |
| tree | f7cba1f72612c5d2132f549881c46ff572e01933 /drivers/md/md.c | |
| parent | d710e13812600037a723a673dc5c96a071de98d3 (diff) | |
| download | linux-4bbf3771ca40d0aaec8316d0e7476b16010288e5.tar.xz | |
md: Relax minimum size restrictions on chunk_size.
Currently, the 'chunk_size' of an array must be at-least PAGE_SIZE.
This makes moving an array to a machine with a larger PAGE_SIZE, or
changing the kernel to use a larger PAGE_SIZE, can stop an array from
working.
For RAID10 and RAID4/5/6, this is non-trivial to fix as the resync
process works on whole pages at a time, and assumes them to be wholly
within a stripe. For other raid personalities, this restriction is
not needed at all and can be dropped.
So remove the test on chunk_size from common can, and add it in just
the places where it is needed: raid10 and raid4/5/6.
Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md/md.c')
| -rw-r--r-- | drivers/md/md.c | 7 |
1 files changed, 1 insertions, 6 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c index a29187d1fcf5..be2014f6e37b 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -3520,17 +3520,12 @@ static int do_md_run(mddev_t * mddev) return -EINVAL; } /* - * chunk-size has to be a power of 2 and multiples of PAGE_SIZE + * chunk-size has to be a power of 2 */ if ( (1 << ffz(~chunk_size)) != chunk_size) { printk(KERN_ERR "chunk_size of %d not valid\n", chunk_size); return -EINVAL; } - if (chunk_size < PAGE_SIZE) { - printk(KERN_ERR "too small chunk_size: %d < %ld\n", - chunk_size, PAGE_SIZE); - return -EINVAL; - } /* devices must have minimum size of one chunk */ rdev_for_each(rdev, tmp, mddev) { |