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scsi: scsi_debug: Reduce DEF_ATOMIC_WR_MAX_LENGTH

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The default atomic write max length in DEF_ATOMIC_WR_MAX_LENGTH is
excessively large.

For 512B LBS, we would get a 4MB max, but due to block layer atomic write
restrictions this is limited to 512KB.

Reduce DEF_ATOMIC_WR_MAX_LENGTH to a value which would be more realistic
(for a real device supporting atomic writes), 64KB.

Signed-off-by: John Garry <john.g.garry@oracle.com>
Link: https://lore.kernel.org/r/20250501100241.930071-1-john.g.garry@oracle.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
John Garry
2025-05-05 22:08:35 -04:00
committed by Martin K. Petersen
parent 0e937fd51e
commit 8c628207d6
1 changed files with 1 additions and 1 deletions
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drivers/scsi/scsi_debug.c
+1 -1
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@@ -162,7 +162,7 @@ static const char *sdebug_version_date = "20210520";
#define DEF_VPD_USE_HOSTNO 1
#define DEF_WRITESAME_LENGTH 0xFFFF
#define DEF_ATOMIC_WR 0
#define DEF_ATOMIC_WR_MAX_LENGTH 8192
#define DEF_ATOMIC_WR_MAX_LENGTH 128
#define DEF_ATOMIC_WR_ALIGN 2
#define DEF_ATOMIC_WR_GRAN 2
#define DEF_ATOMIC_WR_MAX_LENGTH_BNDRY (DEF_ATOMIC_WR_MAX_LENGTH)