forked from Minki/linux
md/raid5: avoid reading parity blocks for full-stripe write to degraded array
When performing a reconstruct write, we need to read all blocks
that are not being over-written .. except the parity (P and Q) blocks.
The code currently reads these (as they are not being over-written!)
unnecessarily.
Signed-off-by: NeilBrown <neilb@suse.de>
Fixes: ea664c8245
("md/raid5: need_this_block: tidy/fix last condition.")
This commit is contained in:
parent
b0c783b323
commit
10d82c5f0d
@ -3282,7 +3282,9 @@ static int need_this_block(struct stripe_head *sh, struct stripe_head_state *s,
|
||||
/* reconstruct-write isn't being forced */
|
||||
return 0;
|
||||
for (i = 0; i < s->failed; i++) {
|
||||
if (!test_bit(R5_UPTODATE, &fdev[i]->flags) &&
|
||||
if (s->failed_num[i] != sh->pd_idx &&
|
||||
s->failed_num[i] != sh->qd_idx &&
|
||||
!test_bit(R5_UPTODATE, &fdev[i]->flags) &&
|
||||
!test_bit(R5_OVERWRITE, &fdev[i]->flags))
|
||||
return 1;
|
||||
}
|
||||
|
Loading…
Reference in New Issue
Block a user