On Tue, Feb 28, 2017 at 11:41:35PM +0800, Ming Lei wrote:
> This patch gets each page's reference of each bio for resync,
> then r1buf_pool_free() gets simplified a lot.
>
> The same policy has been taken in raid10's buf pool allocation/free
> too.
We are going to delete the code, this simplify isn't really required.
>
> Signed-off-by: Ming Lei <tom.leiming@xxxxxxxxx>
> ---
> drivers/md/raid1.c | 15 +++++++--------
> 1 file changed, 7 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
> index 25c9172db639..c442b4657e2f 100644
> --- a/drivers/md/raid1.c
> +++ b/drivers/md/raid1.c
> @@ -139,9 +139,12 @@ static void * r1buf_pool_alloc(gfp_t gfp_flags, void *data)
> /* If not user-requests, copy the page pointers to all bios */
> if (!test_bit(MD_RECOVERY_REQUESTED, &pi->mddev->recovery)) {
> for (i=0; i<RESYNC_PAGES ; i++)
> - for (j=1; j<pi->raid_disks; j++)
> - r1_bio->bios[j]->bi_io_vec[i].bv_page =
> + for (j=1; j<pi->raid_disks; j++) {
> + struct page *page =
> r1_bio->bios[0]->bi_io_vec[i].bv_page;
> + get_page(page);
> + r1_bio->bios[j]->bi_io_vec[i].bv_page = page;
> + }
> }
>
> r1_bio->master_bio = NULL;
> @@ -166,12 +169,8 @@ static void r1buf_pool_free(void *__r1_bio, void *data)
> struct r1bio *r1bio = __r1_bio;
>
> for (i = 0; i < RESYNC_PAGES; i++)
> - for (j = pi->raid_disks; j-- ;) {
> - if (j == 0 ||
> - r1bio->bios[j]->bi_io_vec[i].bv_page !=
> - r1bio->bios[0]->bi_io_vec[i].bv_page)
> - safe_put_page(r1bio->bios[j]->bi_io_vec[i].bv_page);
> - }
> + for (j = pi->raid_disks; j-- ;)
> + safe_put_page(r1bio->bios[j]->bi_io_vec[i].bv_page);
> for (i=0 ; i < pi->raid_disks; i++)
> bio_put(r1bio->bios[i]);
>
> --
> 2.7.4
>
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