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md: raid10: retrieve page from preallocated resync page array

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Now one page array is allocated for each resync bio, and we can
retrieve page from this table directly.

Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Shaohua Li <shli@fb.com>
This commit is contained in:
Ming Lei 2017-03-17 00:12:34 +08:00 committed by Shaohua Li
parent f025061836
commit cdb76be315
1 changed files with 9 additions and 4 deletions
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13
drivers/md/raid10.c
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@ -2055,6 +2055,7 @@ static void sync_request_write(struct mddev *mddev, struct r10bio *r10_bio)
int i, first;
struct bio *tbio, *fbio;
int vcnt;
struct page **tpages, **fpages;
atomic_set(&r10_bio->remaining, 1);
@ -2070,6 +2071,7 @@ static void sync_request_write(struct mddev *mddev, struct r10bio *r10_bio)
fbio = r10_bio->devs[i].bio;
fbio->bi_iter.bi_size = r10_bio->sectors << 9;
fbio->bi_iter.bi_idx = 0;
fpages = get_resync_pages(fbio)->pages;
vcnt = (r10_bio->sectors + (PAGE_SIZE >> 9) - 1) >> (PAGE_SHIFT - 9);
/* now find blocks with errors */
@ -2084,6 +2086,8 @@ static void sync_request_write(struct mddev *mddev, struct r10bio *r10_bio)
continue;
if (i == first)
continue;
tpages = get_resync_pages(tbio)->pages;
d = r10_bio->devs[i].devnum;
rdev = conf->mirrors[d].rdev;
if (!r10_bio->devs[i].bio->bi_error) {
@ -2096,8 +2100,8 @@ static void sync_request_write(struct mddev *mddev, struct r10bio *r10_bio)
int len = PAGE_SIZE;
if (sectors < (len / 512))
len = sectors * 512;
if (memcmp(page_address(fbio->bi_io_vec[j].bv_page),
page_address(tbio->bi_io_vec[j].bv_page),
if (memcmp(page_address(fpages[j]),
page_address(tpages[j]),
len))
break;
sectors -= len/512;
@ -2195,6 +2199,7 @@ static void fix_recovery_read_error(struct r10bio *r10_bio)
int idx = 0;
int dr = r10_bio->devs[0].devnum;
int dw = r10_bio->devs[1].devnum;
struct page **pages = get_resync_pages(bio)->pages;
while (sectors) {
int s = sectors;
@ -2210,7 +2215,7 @@ static void fix_recovery_read_error(struct r10bio *r10_bio)
ok = sync_page_io(rdev,
addr,
s << 9,
bio->bi_io_vec[idx].bv_page,
pages[idx],
REQ_OP_READ, 0, false);
if (ok) {
rdev = conf->mirrors[dw].rdev;
@ -2218,7 +2223,7 @@ static void fix_recovery_read_error(struct r10bio *r10_bio)
ok = sync_page_io(rdev,
addr,
s << 9,
bio->bi_io_vec[idx].bv_page,
pages[idx],
REQ_OP_WRITE, 0, false);
if (!ok) {
set_bit(WriteErrorSeen, &rdev->flags);