From afd48513f0019a2048afed0d98904d3fec7e05dd Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Thu, 21 Jun 2018 18:04:05 +0200 Subject: [PATCH] btrfs: use monotonic time for transaction handling The transaction times were changed to ktime_get_real_seconds to avoid the y2038 overflow, but they still have a minor problem when they go backwards or jump due to settimeofday() or leap seconds. This changes the transaction handling to instead use ktime_get_seconds(), which returns a CLOCK_MONOTONIC timestamp that has neither of those problems. Signed-off-by: Arnd Bergmann Reviewed-by: Nikolay Borisov Reviewed-by: David Sterba Signed-off-by: David Sterba --- fs/btrfs/disk-io.c | 2 +- fs/btrfs/transaction.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 6318ac2539d3..2de3da7b7bdc 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -1805,7 +1805,7 @@ static int transaction_kthread(void *arg) goto sleep; } - now = ktime_get_real_seconds(); + now = ktime_get_seconds(); if (cur->state < TRANS_STATE_BLOCKED && !test_bit(BTRFS_FS_NEED_ASYNC_COMMIT, &fs_info->flags) && (now < cur->start_time || diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c index 56c8bab0b816..ebe50dfb8947 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -241,7 +241,7 @@ loop: refcount_set(&cur_trans->use_count, 2); atomic_set(&cur_trans->pending_ordered, 0); cur_trans->flags = 0; - cur_trans->start_time = ktime_get_real_seconds(); + cur_trans->start_time = ktime_get_seconds(); memset(&cur_trans->delayed_refs, 0, sizeof(cur_trans->delayed_refs));