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NFSv4.0: Fix the wake up of the next waiter in nfs_release_seqid()

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There is no need to wake up another waiter on the seqid list unless the
seqid being removed is at the head of the list, and so is relinquishing
control of the sequence counter to the next entry.

Reviewed-by: Yang Erkun <yangerkun@huawei.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Trond Myklebust 2024-11-08 11:41:21 -05:00
parent 675d4566e5
commit c968fd23c6
1 changed files with 4 additions and 6 deletions
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10
fs/nfs/nfs4state.c
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@ -1083,14 +1083,12 @@ void nfs_release_seqid(struct nfs_seqid *seqid)
return;
sequence = seqid->sequence;
spin_lock(&sequence->lock);
list_del_init(&seqid->list);
if (!list_empty(&sequence->list)) {
struct nfs_seqid *next;
next = list_first_entry(&sequence->list,
struct nfs_seqid, list);
if (list_is_first(&seqid->list, &sequence->list) &&
!list_is_singular(&sequence->list)) {
struct nfs_seqid *next = list_next_entry(seqid, list);
rpc_wake_up_queued_task(&sequence->wait, next->task);
}
list_del_init(&seqid->list);
spin_unlock(&sequence->lock);
}