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Relax serialization of SYNCHRONIZE CACHE commands.

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Before this change SYNCHRONIZE CACHE commands were executed exclusively,
as if they had ORDERED tag.  But looking through SCSI specs I've found
no any reason to be so strict.  For reads this ordering seems pointless.
For writes it looks less obvious, so I left ordering against preceeding
write commands, while following ones are no longer required to wait.

MFC after:	2 weeks
Sponsored by:	iXsystems, Inc.
This commit is contained in:
Alexander Motin 2015-08-05 21:58:32 +00:00
parent a2925a5ae3
commit f2a20b166a
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=286345
3 changed files with 20 additions and 18 deletions
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8
sys/cam/ctl/ctl_cmd_table.c
View File

@ -785,8 +785,8 @@ const struct ctl_cmd_entry ctl_cmd_table[256] =
{NULL, CTL_SERIDX_INVLD, CTL_CMD_FLAG_NONE, CTL_LUN_PAT_NONE},
/* 35 SYNCHRONIZE CACHE(10) */
{ctl_sync_cache, CTL_SERIDX_START, CTL_CMD_FLAG_OK_ON_SLUN |
CTL_FLAG_DATA_NONE,
{ctl_sync_cache, CTL_SERIDX_SYNC, CTL_CMD_FLAG_OK_ON_SLUN |
CTL_FLAG_DATA_NONE,
CTL_LUN_PAT_NONE,
10, {0, 0xff, 0xff, 0xff, 0xff, 0, 0xff, 0xff, 0x07}},
@ -1138,8 +1138,8 @@ const struct ctl_cmd_entry ctl_cmd_table[256] =
{NULL, CTL_SERIDX_INVLD, CTL_CMD_FLAG_NONE, CTL_LUN_PAT_NONE},
/* 91 SYNCHRONIZE CACHE(16) */
{ctl_sync_cache, CTL_SERIDX_START, CTL_CMD_FLAG_OK_ON_SLUN |
CTL_FLAG_DATA_NONE,
{ctl_sync_cache, CTL_SERIDX_SYNC, CTL_CMD_FLAG_OK_ON_SLUN |
CTL_FLAG_DATA_NONE,
CTL_LUN_PAT_NONE,
16, {0, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0x07}},

1
sys/cam/ctl/ctl_private.h
View File

@ -141,6 +141,7 @@ typedef enum {
CTL_SERIDX_READ,
CTL_SERIDX_WRITE,
CTL_SERIDX_UNMAP,
CTL_SERIDX_SYNC,
CTL_SERIDX_MD_SNS,
CTL_SERIDX_MD_SEL,
CTL_SERIDX_RQ_SNS,

29
sys/cam/ctl/ctl_ser_table.c
View File

@ -63,19 +63,20 @@
static ctl_serialize_action
ctl_serialize_table[CTL_SERIDX_COUNT][CTL_SERIDX_COUNT] = {
/**>IDX_ :: 2nd:TUR RD WRT UNM MDSN MDSL RQSN INQ RDCP RES LSNS FMT STR*/
/*TUR */{ pS, pS, pS, pS, bK, bK, bK, pS, pS, bK, pS, bK, bK},
/*READ */{ pS, xS, xT, bO, bK, bK, bK, pS, pS, bK, pS, bK, bK},
/*WRITE */{ pS, xT, xT, bO, bK, bK, bK, pS, pS, bK, pS, bK, bK},
/*UNMAP */{ pS, xO, xO, pS, bK, bK, bK, pS, pS, bK, pS, bK, bK},
/*MD_SNS */{ bK, bK, bK, bK, pS, bK, bK, pS, pS, bK, pS, bK, bK},
/*MD_SEL */{ bK, bK, bK, bK, bK, bK, bK, pS, pS, bK, pS, bK, bK},
/*RQ_SNS */{ pS, pS, pS, pS, pS, pS, bK, pS, pS, bK, pS, bK, bK},
/*INQ */{ pS, pS, pS, pS, pS, pS, bK, pS, pS, pS, pS, bK, bK},
/*RD_CAP */{ pS, pS, pS, pS, pS, pS, bK, pS, pS, pS, pS, bK, pS},
/*RES */{ bK, bK, bK, bK, bK, bK, bK, pS, bK, bK, bK, bK, bK},
/*LOG_SNS */{ pS, pS, pS, pS, pS, bK, bK, pS, pS, bK, pS, bK, bK},
/*FORMAT */{ pS, bK, bK, bK, bK, bK, pS, pS, bK, bK, bK, bK, bK},
/*START */{ bK, bK, bK, bK, bK, bK, bK, pS, bK, bK, bK, bK, bK},
/**>IDX_ :: 2nd:TUR RD WRT UNM SYN MDSN MDSL RQSN INQ RDCP RES LSNS FMT STR*/
/*TUR */{ pS, pS, pS, pS, pS, bK, bK, bK, pS, pS, bK, pS, bK, bK},
/*READ */{ pS, xS, xT, bO, pS, bK, bK, bK, pS, pS, bK, pS, bK, bK},
/*WRITE */{ pS, xT, xT, bO, bO, bK, bK, bK, pS, pS, bK, pS, bK, bK},
/*UNMAP */{ pS, xO, xO, pS, pS, bK, bK, bK, pS, pS, bK, pS, bK, bK},
/*SYNC */{ pS, pS, pS, pS, pS, bK, bK, bK, pS, pS, bK, pS, bK, bK},
/*MD_SNS */{ bK, bK, bK, bK, bK, pS, bK, bK, pS, pS, bK, pS, bK, bK},
/*MD_SEL */{ bK, bK, bK, bK, bK, bK, bK, bK, pS, pS, bK, pS, bK, bK},
/*RQ_SNS */{ pS, pS, pS, pS, pS, pS, pS, bK, pS, pS, bK, pS, bK, bK},
/*INQ */{ pS, pS, pS, pS, pS, pS, pS, bK, pS, pS, pS, pS, bK, bK},
/*RD_CAP */{ pS, pS, pS, pS, pS, pS, pS, bK, pS, pS, pS, pS, bK, pS},
/*RES */{ bK, bK, bK, bK, bK, bK, bK, bK, pS, bK, bK, bK, bK, bK},
/*LOG_SNS */{ pS, pS, pS, pS, pS, pS, bK, bK, pS, pS, bK, pS, bK, bK},
/*FORMAT */{ pS, bK, bK, bK, bK, bK, bK, pS, pS, bK, bK, bK, bK, bK},
/*START */{ bK, bK, bK, bK, bK, bK, bK, bK, pS, bK, bK, bK, bK, bK},
};