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Commit 571e09ee authored by Abhilash Jindal's avatar Abhilash Jindal Committed by Doug Ledford
Browse files

IB/mlx4: Use boottime 



Wall time obtained from ktime_get_real_ns is susceptible to sudden jumps due to
user setting the time or due to NTP.  Boot time is constantly increasing time
better suited for comparing two timestamps.

Signed-off-by: default avatarAbhilash Jindal <klock.android@gmail.com>
Reviewed-by: default avatarLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent fc77dbd3

drivers/infiniband/hw/mlx4/alias_GUID.c

+3 −3
Original line number Diff line number Diff line
@@ -310,7 +310,7 @@ static void aliasguid_query_handler(int status, 
	if (status) {

		pr_debug("(port: %d) failed: status = %d\n",

			 cb_ctx->port, status);

		rec->time_to_run = ktime_get_real_ns() + 1 * NSEC_PER_SEC;

		rec->time_to_run = ktime_get_boot_ns() + 1 * NSEC_PER_SEC;

		goto out;

	}
@@ -416,7 +416,7 @@ static void aliasguid_query_handler(int status, 
			 be64_to_cpu((__force __be64)rec->guid_indexes),

			 be64_to_cpu((__force __be64)applied_guid_indexes),

			 be64_to_cpu((__force __be64)declined_guid_indexes));

		rec->time_to_run = ktime_get_real_ns() +

		rec->time_to_run = ktime_get_boot_ns() +

			resched_delay_sec * NSEC_PER_SEC;

	} else {

		rec->status = MLX4_GUID_INFO_STATUS_SET;
@@ -708,7 +708,7 @@ static int get_low_record_time_index(struct mlx4_ib_dev *dev, u8 port, 
		}

	}

	if (resched_delay_sec) {

		u64 curr_time = ktime_get_real_ns();

		u64 curr_time = ktime_get_boot_ns();



		*resched_delay_sec = (low_record_time < curr_time) ? 0 :

			div_u64((low_record_time - curr_time), NSEC_PER_SEC);