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authorKeith Busch <keith.busch@intel.com>2015-01-08 04:55:46 +0300
committerJens Axboe <axboe@fb.com>2015-01-08 18:59:01 +0300
commit5b3f25fc343690cafd3e27431a69a7bdaf9df001 (patch)
tree8892062d8290c520faf5daf355bcc303501919d5 /include
parent1885b24d23716e09b9c952822b05fd7f68099cdb (diff)
downloadlinux-5b3f25fc343690cafd3e27431a69a7bdaf9df001.tar.xz
blk-mq: Allow requests to never expire
Some types of requests may be started that are not gauranteed to ever complete. This adds a request flag that a driver can use so mark the request as such. Signed-off-by: Keith Busch <keith.busch@intel.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'include')
-rw-r--r--include/linux/blk_types.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index 445d59231bc4..c294e3e25e37 100644
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h
@@ -190,6 +190,7 @@ enum rq_flag_bits {
__REQ_PM, /* runtime pm request */
__REQ_HASHED, /* on IO scheduler merge hash */
__REQ_MQ_INFLIGHT, /* track inflight for MQ */
+ __REQ_NO_TIMEOUT, /* requests may never expire */
__REQ_NR_BITS, /* stops here */
};
@@ -243,5 +244,6 @@ enum rq_flag_bits {
#define REQ_PM (1ULL << __REQ_PM)
#define REQ_HASHED (1ULL << __REQ_HASHED)
#define REQ_MQ_INFLIGHT (1ULL << __REQ_MQ_INFLIGHT)
+#define REQ_NO_TIMEOUT (1ULL << __REQ_NO_TIMEOUT)
#endif /* __LINUX_BLK_TYPES_H */