| Message ID | 20220418045314.360785-8-hch@lst.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [01/11] ubd: don't set the discard_alignment queue limit | expand |
On 18/04/2022 06:53, Christoph Hellwig wrote: > The discard_alignment queue limit is named a bit misleading means the > offset into the block device at which the discard granularity starts. > Setting it to PAGE_SIZE while the discard granularity is the block size > that is smaller or the same as PAGE_SIZE as done by dasd is mostly > harmless but also useless. > > Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Jan Höppner <hoeppner@linux.ibm.com> Sorry for a rather late answer. I saw that Jens already applied the patches so it's fine when the Ack isn't added anymore. Wanted to send it anyway so that you know we're aware of it. > --- > drivers/s390/block/dasd_fba.c | 1 - > 1 file changed, 1 deletion(-) > > diff --git a/drivers/s390/block/dasd_fba.c b/drivers/s390/block/dasd_fba.c > index 8bd5665db9198..60be7f7bf2d16 100644 > --- a/drivers/s390/block/dasd_fba.c > +++ b/drivers/s390/block/dasd_fba.c > @@ -782,7 +782,6 @@ static void dasd_fba_setup_blk_queue(struct dasd_block *block) > blk_queue_segment_boundary(q, PAGE_SIZE - 1); > > q->limits.discard_granularity = logical_block_size; > - q->limits.discard_alignment = PAGE_SIZE; > > /* Calculate max_discard_sectors and make it PAGE aligned */ > max_bytes = USHRT_MAX * logical_block_size;
diff --git a/drivers/s390/block/dasd_fba.c b/drivers/s390/block/dasd_fba.c index 8bd5665db9198..60be7f7bf2d16 100644 --- a/drivers/s390/block/dasd_fba.c +++ b/drivers/s390/block/dasd_fba.c @@ -782,7 +782,6 @@ static void dasd_fba_setup_blk_queue(struct dasd_block *block) blk_queue_segment_boundary(q, PAGE_SIZE - 1); q->limits.discard_granularity = logical_block_size; - q->limits.discard_alignment = PAGE_SIZE; /* Calculate max_discard_sectors and make it PAGE aligned */ max_bytes = USHRT_MAX * logical_block_size;
The discard_alignment queue limit is named a bit misleading means the offset into the block device at which the discard granularity starts. Setting it to PAGE_SIZE while the discard granularity is the block size that is smaller or the same as PAGE_SIZE as done by dasd is mostly harmless but also useless. Signed-off-by: Christoph Hellwig <hch@lst.de> --- drivers/s390/block/dasd_fba.c | 1 - 1 file changed, 1 deletion(-)