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authorLinus Torvalds <torvalds@linux-foundation.org>2014-04-10 09:26:55 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-04-10 09:26:55 -0700
commitdd76a786af1f09e9122e150d30156e094e2a94b4 (patch)
tree97ff3d0d45d8df3294d3ec913eec728eb1c2ab57 /include
parente7990d45bb88c2f0565b5ee4c32eefe81653faff (diff)
parent360f92c2443073143467a0088daffec96a17910b (diff)
Merge branch 'for-linus' of git://git.kernel.dk/linux-block
Pull block layer fixes from Jens Axboe: "A small collection of fixes that should go in before -rc1. The pull request contains: - A two patch fix for a regression with block enabled tagging caused by a commit in the initial pull request. One patch is from Martin and ensures that SCSI doesn't truncate 64-bit block flags, the other one is from me and prevents us from double using struct request queuelist for both completion and busy tags. This caused anything from a boot crash for some, to crashes under load. - A blk-mq fix for a potential soft stall when hot unplugging CPUs with busy IO. - percpu_counter fix is listed in here, that caused a suspend issue with virtio-blk due to percpu counters having an inconsistent state during CPU removal. Andrew sent this in separately a few days ago, but it's here. JFYI. - A few fixes for block integrity from Martin. - A ratelimit fix for loop from Mike Galbraith, to avoid spewing too much in error cases" * 'for-linus' of git://git.kernel.dk/linux-block: block: fix regression with block enabled tagging scsi: Make sure cmd_flags are 64-bit block: Ensure we only enable integrity metadata for reads and writes block: Fix integrity verification block: Fix for_each_bvec() drivers/block/loop.c: ratelimit error messages blk-mq: fix potential stall during CPU unplug with IO pending percpu_counter: fix bad counter state during suspend
Diffstat (limited to 'include')
-rw-r--r--include/linux/bio.h6
-rw-r--r--include/linux/blk_types.h2
-rw-r--r--include/linux/blkdev.h13
-rw-r--r--include/scsi/scsi_device.h4
4 files changed, 19 insertions, 6 deletions
diff --git a/include/linux/bio.h b/include/linux/bio.h
index 5a4d39b4686..5aa372a7380 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -216,9 +216,9 @@ static inline void bvec_iter_advance(struct bio_vec *bv, struct bvec_iter *iter,
}
#define for_each_bvec(bvl, bio_vec, iter, start) \
- for ((iter) = start; \
- (bvl) = bvec_iter_bvec((bio_vec), (iter)), \
- (iter).bi_size; \
+ for (iter = (start); \
+ (iter).bi_size && \
+ ((bvl = bvec_iter_bvec((bio_vec), (iter))), 1); \
bvec_iter_advance((bio_vec), &(iter), (bvl).bv_len))
diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index bbc3a6c88fc..aa0eaa2d0bd 100644
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h
@@ -189,6 +189,7 @@ enum rq_flag_bits {
__REQ_KERNEL, /* direct IO to kernel pages */
__REQ_PM, /* runtime pm request */
__REQ_END, /* last of chain of requests */
+ __REQ_HASHED, /* on IO scheduler merge hash */
__REQ_NR_BITS, /* stops here */
};
@@ -241,5 +242,6 @@ enum rq_flag_bits {
#define REQ_KERNEL (1ULL << __REQ_KERNEL)
#define REQ_PM (1ULL << __REQ_PM)
#define REQ_END (1ULL << __REQ_END)
+#define REQ_HASHED (1ULL << __REQ_HASHED)
#endif /* __LINUX_BLK_TYPES_H */
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 1e1fa3f93d5..99617cf7dd1 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -118,7 +118,18 @@ struct request {
struct bio *bio;
struct bio *biotail;
- struct hlist_node hash; /* merge hash */
+ /*
+ * The hash is used inside the scheduler, and killed once the
+ * request reaches the dispatch list. The ipi_list is only used
+ * to queue the request for softirq completion, which is long
+ * after the request has been unhashed (and even removed from
+ * the dispatch list).
+ */
+ union {
+ struct hlist_node hash; /* merge hash */
+ struct list_head ipi_list;
+ };
+
/*
* The rb_node is only used inside the io scheduler, requests
* are pruned when moved to the dispatch queue. So let the
diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h
index 4e845b80efd..5853c913d2b 100644
--- a/include/scsi/scsi_device.h
+++ b/include/scsi/scsi_device.h
@@ -423,11 +423,11 @@ extern int scsi_is_target_device(const struct device *);
extern int scsi_execute(struct scsi_device *sdev, const unsigned char *cmd,
int data_direction, void *buffer, unsigned bufflen,
unsigned char *sense, int timeout, int retries,
- int flag, int *resid);
+ u64 flags, int *resid);
extern int scsi_execute_req_flags(struct scsi_device *sdev,
const unsigned char *cmd, int data_direction, void *buffer,
unsigned bufflen, struct scsi_sense_hdr *sshdr, int timeout,
- int retries, int *resid, int flags);
+ int retries, int *resid, u64 flags);
static inline int scsi_execute_req(struct scsi_device *sdev,
const unsigned char *cmd, int data_direction, void *buffer,
unsigned bufflen, struct scsi_sense_hdr *sshdr, int timeout,