NVMe: Make IO timeout a module parameter

PATCH New Keith Busch 1 participant 1 message Apr 4, 2014

Subsystems (2)

Block layer NVMe

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Keith Busch

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2014-04-04 17:43 UTC #0 lore raw

PATCH 1/1 NVMe: Make IO timeout a module parameter

Signed-off-by Keith Busch <keith.busch at intel.com>

---
 drivers/block/nvme-core.c |    5 +++++
 include/linux/nvme.h      |    3 ++-
 2 files changed, 7 insertions(+), 1 deletion(-)

drivers/block/nvme-core.c +5 -0

index 625259d..b43d2b6 100644
@@ -50,6 +50,11 @@
 #define CQ_SIZE(depth)		(depth * sizeof(struct nvme_completion))
 #define ADMIN_TIMEOUT	(60 * HZ)
 
+ushort io_timeout = 5;
+module_param(io_timeout, ushort, 0644);
+MODULE_PARM_DESC(io_timeout,
+			"timeout in seconds for io submitted to h/w queue");
+
 static int nvme_major;
 module_param(nvme_major, int, 0);

include/linux/nvme.h +2 -1

index 15d071e..2a28d84 100644
@@ -66,7 +66,8 @@ enum {
 
 #define NVME_VS(major, minor)	(major << 16 | minor)
 
-#define NVME_IO_TIMEOUT	(5 * HZ)
+extern ushort io_timeout;
+#define NVME_IO_TIMEOUT	(io_timeout * HZ)
 
 /*
  * Represents an NVM Express device.  Each nvme_dev is a PCI function.

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