From e8ff419a0c98a144a85b9bfcfbd175a1927cb926 Mon Sep 17 00:00:00 2001 From: Tatyana Brokhman Date: Thu, 24 Jan 2013 14:01:25 +0200 Subject: 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: Tatyana Brokhman Signed-off-by: Stefan Guendhoer --- include/linux/blk_types.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h index e8c111ae2..56ef6346f 100644 --- a/include/linux/blk_types.h +++ b/include/linux/blk_types.h @@ -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 */ @@ -181,6 +181,7 @@ enum rq_flag_bits { __REQ_MIXED_MERGE, /* merge of different types, fail separately */ __REQ_KERNEL, /* direct IO to kernel pages */ __REQ_PM, /* runtime pm request */ + __REQ_URGENT, /* urgent request */ __REQ_NR_BITS, /* stops here */ }; @@ -193,6 +194,7 @@ enum rq_flag_bits { #define REQ_PRIO (1 << __REQ_PRIO) #define REQ_DISCARD (1 << __REQ_DISCARD) #define REQ_WRITE_SAME (1 << __REQ_WRITE_SAME) +#define REQ_URGENT (1 << __REQ_URGENT) #define REQ_NOIDLE (1 << __REQ_NOIDLE) #define REQ_FAILFAST_MASK \ -- cgit v1.2.3