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inode: port __I_LRU_ISOLATING to var event

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Port the __I_LRU_ISOLATING mechanism to use the new var event mechanism.

Link: https://lore.kernel.org/r/20240823-work-i_state-v3-5-5cd5fd207a57@kernel.org
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Christian Brauner 2024-08-23 14:47:39 +02:00
parent 0fe340a98b
commit f469e6e6f5
1 changed files with 20 additions and 9 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

29
fs/inode.c
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@ -511,24 +511,35 @@ static void inode_unpin_lru_isolating(struct inode *inode)
spin_lock(&inode->i_lock);
WARN_ON(!(inode->i_state & I_LRU_ISOLATING));
inode->i_state &= ~I_LRU_ISOLATING;
smp_mb();
wake_up_bit(&inode->i_state, __I_LRU_ISOLATING);
/* Called with inode->i_lock which ensures memory ordering. */
inode_wake_up_bit(inode, __I_LRU_ISOLATING);
spin_unlock(&inode->i_lock);
}
static void inode_wait_for_lru_isolating(struct inode *inode)
{
lockdep_assert_held(&inode->i_lock);
if (inode->i_state & I_LRU_ISOLATING) {
DEFINE_WAIT_BIT(wq, &inode->i_state, __I_LRU_ISOLATING);
wait_queue_head_t *wqh;
struct wait_bit_queue_entry wqe;
struct wait_queue_head *wq_head;
wqh = bit_waitqueue(&inode->i_state, __I_LRU_ISOLATING);
lockdep_assert_held(&inode->i_lock);
if (!(inode->i_state & I_LRU_ISOLATING))
return;
wq_head = inode_bit_waitqueue(&wqe, inode, __I_LRU_ISOLATING);
for (;;) {
prepare_to_wait_event(wq_head, &wqe.wq_entry, TASK_UNINTERRUPTIBLE);
/*
* Checking I_LRU_ISOLATING with inode->i_lock guarantees
* memory ordering.
*/
if (!(inode->i_state & I_LRU_ISOLATING))
break;
spin_unlock(&inode->i_lock);
__wait_on_bit(wqh, &wq, bit_wait, TASK_UNINTERRUPTIBLE);
schedule();
spin_lock(&inode->i_lock);
WARN_ON(inode->i_state & I_LRU_ISOLATING);
}
finish_wait(wq_head, &wqe.wq_entry);
WARN_ON(inode->i_state & I_LRU_ISOLATING);
}
/**