[RFC PATCH -next v3 05/10] scsi: sd: set BLK_FEAT_WRITE_ZEROES_UNMAP if device supports unmap zeroing mode
From: Zhang Yi <hidden>
Date: 2025-03-18 07:44:15
Also in:
dm-devel, linux-ext4, linux-fsdevel, linux-nvme, linux-scsi, linux-xfs, lkml
Subsystem:
scsi subsystem, the rest · Maintainers:
"James E.J. Bottomley", "Martin K. Petersen", Linus Torvalds
From: Zhang Yi <yi.zhang@huawei.com> When the device supports the Write Zeroes command and the zeroing mode is set to SD_ZERO_WS16_UNMAP or SD_ZERO_WS10_UNMAP, this means that the device supports unmap Write Zeroes, so set the corresponding BLK_FEAT_WRITE_ZEROES_UNMAP feature to the device's queue limit. Signed-off-by: Zhang Yi <yi.zhang@huawei.com> Reviewed-by: Christoph Hellwig <hch@lst.de> --- drivers/scsi/sd.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 950d8c9fb884..652630b410de 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c@@ -1118,6 +1118,11 @@ static void sd_config_write_same(struct scsi_disk *sdkp, else sdkp->zeroing_mode = SD_ZERO_WRITE; + if (sdkp->max_ws_blocks && + (sdkp->zeroing_mode == SD_ZERO_WS16_UNMAP || + sdkp->zeroing_mode == SD_ZERO_WS10_UNMAP)) + lim->features |= BLK_FEAT_WRITE_ZEROES_UNMAP; + if (sdkp->max_ws_blocks && sdkp->physical_block_size > logical_block_size) { /*
--
2.46.1