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Commit 7ce751bf authored by Tatyana Brokhman's avatar Tatyana Brokhman Committed by Channagoud Kadabi
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block: add REQ_URGENT to request flags 



This patch adds a new flag to be used in cmd_flags field of struct request
for marking request as urgent.
Urgent request is the one that should be given priority currently handled
(regular) request by the device driver. The decision of a request urgency
is taken by the scheduler.

Change-Id: Ic20470987ef23410f1d0324f96f00578f7df8717
Signed-off-by: default avatarTatyana Brokhman <tlinder@codeaurora.org>
[venkatg@codeaurora.org: resolved trivial merge conflict]
Signed-off-by: default avatarVenkat Gopalakrishnan <venkatg@codeaurora.org>
[subhashj@codeaurora.org: resolved trivial merge conflicts]
Signed-off-by: default avatarSubhash Jadavani <subhashj@codeaurora.org>
parent ba1ec85e

include/linux/blk_types.h

+3 −1
Original line number Diff line number Diff line
@@ -162,7 +162,7 @@ enum rq_flag_bits { 
				 * throttling rules. Don't do it again. */



	/* request only flags */

	__REQ_SORTED,		/* elevator knows about this request */

	__REQ_SORTED = __REQ_RAHEAD, /* elevator knows about this request */

	__REQ_SOFTBARRIER,	/* may not be passed by ioscheduler */

	__REQ_NOMERGE,		/* don't touch this for merging */

	__REQ_STARTED,		/* drive already may have started this one */
@@ -182,6 +182,7 @@ enum rq_flag_bits { 
	__REQ_PM,		/* runtime pm request */

	__REQ_HASHED,		/* on IO scheduler merge hash */

	__REQ_MQ_INFLIGHT,	/* track inflight for MQ */

	__REQ_URGENT,		/* urgent request */

	__REQ_NR_BITS,		/* stops here */

};
@@ -191,6 +192,7 @@ enum rq_flag_bits { 
#define REQ_SYNC		(1ULL << __REQ_SYNC)

#define REQ_META		(1ULL << __REQ_META)

#define REQ_PRIO		(1ULL << __REQ_PRIO)

#define REQ_URGENT		(1ULL << __REQ_URGENT)

#define REQ_NOIDLE		(1ULL << __REQ_NOIDLE)

#define REQ_INTEGRITY		(1ULL << __REQ_INTEGRITY)