On 3/8/21 11:21 AM, JeffleXu wrote: > Hi, Mike, > > Would you please spare some time to review the following patches for > stable tree? > > - [1] for 4.4.y > - [2] for 4.9.y > - [3] for 4.14.y > - [4] for 4.19.y > > While backporting [5] for stable tree, there's some extra code specific > to stable tree needs to be fixed, see [6] for the background info. > > [1] https://www.spinics.net/lists/stable/msg448728.html > [2] https://www.spinics.net/lists/stable/msg448737.html > [3] https://www.spinics.net/lists/stable/msg448740.html > [4] https://www.spinics.net/lists/stable/msg448748.html > [5] > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?h=v5.12-rc2&id=a4c8dd9c2d0987cf542a2a0c42684c9c6d78a04e > [6] https://www.spinics.net/lists/stable/msg448757.html > Sorry, it seems that this patch should not be separated from patch [5], as the NO_SG_MERGE capability check also calls dm_table_all_devices_attribute(), which has been removed in patch [5]. It will break the per-patch build-test when leave this patch not applied. I will send a new version later. Please review on the new version directly. > > > On 3/5/21 2:30 PM, Jeffle Xu wrote: >> Similar to commit a4c8dd9c2d09 ("dm table: fix iterate_devices based >> device capability checks"), fix NO_SG_MERGE capability check and invert >> logic of the corresponding iterate_devices_callout_fn so that all >> devices' NO_SG_MERGE capabilities are properly checked. >> >> Signed-off-by: Jeffle Xu <jefflexu@xxxxxxxxxxxxxxxxx> >> Fixes: 200612ec33e5 ("dm table: propagate QUEUE_FLAG_NO_SG_MERGE") >> --- >> drivers/md/dm-table.c | 12 ++++++------ >> 1 file changed, 6 insertions(+), 6 deletions(-) >> >> diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c >> index 6580de65b81d..7ee520d4d216 100644 >> --- a/drivers/md/dm-table.c >> +++ b/drivers/md/dm-table.c >> @@ -1436,12 +1436,12 @@ static int device_is_not_random(struct dm_target *ti, struct dm_dev *dev, >> return q && !blk_queue_add_random(q); >> } >> >> -static int queue_supports_sg_merge(struct dm_target *ti, struct dm_dev *dev, >> - sector_t start, sector_t len, void *data) >> +static int queue_no_sg_merge(struct dm_target *ti, struct dm_dev *dev, >> + sector_t start, sector_t len, void *data) >> { >> struct request_queue *q = bdev_get_queue(dev->bdev); >> >> - return q && !test_bit(QUEUE_FLAG_NO_SG_MERGE, &q->queue_flags); >> + return q && test_bit(QUEUE_FLAG_NO_SG_MERGE, &q->queue_flags); >> } >> >> static int device_not_write_same_capable(struct dm_target *ti, struct dm_dev *dev, >> @@ -1542,10 +1542,10 @@ void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q, >> if (!dm_table_supports_write_same(t)) >> q->limits.max_write_same_sectors = 0; >> >> - if (dm_table_all_devices_attribute(t, queue_supports_sg_merge)) >> - queue_flag_clear_unlocked(QUEUE_FLAG_NO_SG_MERGE, q); >> - else >> + if (dm_table_any_dev_attr(t, queue_no_sg_merge)) >> queue_flag_set_unlocked(QUEUE_FLAG_NO_SG_MERGE, q); >> + else >> + queue_flag_clear_unlocked(QUEUE_FLAG_NO_SG_MERGE, q); >> >> dm_table_verify_integrity(t); >> >> > -- Thanks, Jeffle
