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NVMe: Make iod bio timeout a parameter

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This was originally set to 4 times the IO timeout, but that was when
the IO timeout was 5 seconds instead of 30. 20 seconds for total time
to failure seemed more reasonable than 2 minutes for most, but other
users have requested to make this a module parameter instead.

Signed-off-by: Keith Busch <keith.busch@intel.com>
[renamed the module parameter to retry_time]
[made retry_time static]
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
This commit is contained in:
Keith Busch 2014-05-13 11:42:01 -06:00 committed by Matthew Wilcox
parent 6808c5fb7f
commit 61e4ce086d
1 changed files with 5 additions and 1 deletions
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6
drivers/block/nvme-core.c
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@ -48,12 +48,16 @@
#define SQ_SIZE(depth) (depth * sizeof(struct nvme_command)) #define SQ_SIZE(depth) (depth * sizeof(struct nvme_command))
#define CQ_SIZE(depth) (depth * sizeof(struct nvme_completion)) #define CQ_SIZE(depth) (depth * sizeof(struct nvme_completion))
#define ADMIN_TIMEOUT (60 * HZ) #define ADMIN_TIMEOUT (60 * HZ)
#define IOD_TIMEOUT (4 * NVME_IO_TIMEOUT) #define IOD_TIMEOUT (retry_time * HZ)
unsigned char io_timeout = 30; unsigned char io_timeout = 30;
module_param(io_timeout, byte, 0644); module_param(io_timeout, byte, 0644);
MODULE_PARM_DESC(io_timeout, "timeout in seconds for I/O"); MODULE_PARM_DESC(io_timeout, "timeout in seconds for I/O");
static unsigned char retry_time = 30;
module_param(retry_time, byte, 0644);
MODULE_PARM_DESC(retry_time, "time in seconds to retry failed I/O");
static int nvme_major; static int nvme_major;
module_param(nvme_major, int, 0); module_param(nvme_major, int, 0);