On Sun, Jun 6, 2021 at 10:14 PM Mikulas Patocka <[email protected]> wrote:
> When comitting superblock, we need to write just one block, we don't need > to write full page. Some architectures have pages larger than 4k and > committing full page is needless overhead. > > Signed-off-by: Mikulas Patocka <[email protected]> > > Index: linux-2.6/drivers/md/dm-writecache.c > =================================================================== > --- linux-2.6.orig/drivers/md/dm-writecache.c > +++ linux-2.6/drivers/md/dm-writecache.c > @@ -532,11 +532,7 @@ static void ssd_commit_superblock(struct > > region.bdev = wc->ssd_dev->bdev; > region.sector = 0; > - region.count = PAGE_SIZE >> SECTOR_SHIFT; > - > - if (unlikely(region.sector + region.count > wc->metadata_sectors)) > - region.count = wc->metadata_sectors - region.sector; > - > + region.count = wc->block_size >> SECTOR_SHIFT; > You can use to_sector() here. > region.sector += wc->start_sector; > > req.bi_op = REQ_OP_WRITE; > > -- > dm-devel mailing list > [email protected] > https://listman.redhat.com/mailman/listinfo/dm-devel > >
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