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btrfs: process ticket outside global reserve critical section

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In steal_from_global_rsv() there's no need to process the ticket inside
the critical section of the global reserve. Move the ticket processing to
happen after the critical section. This helps reduce contention on the
global reserve's spinlock.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Filipe Manana 2025-10-17 17:34:36 +01:00 committed by David Sterba
parent 5ca7725ddf
commit 189db25105
1 changed files with 4 additions and 3 deletions
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7
fs/btrfs/space-info.c
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@ -1062,13 +1062,14 @@ static bool steal_from_global_rsv(struct btrfs_space_info *space_info,
return false;
}
global_rsv->reserved -= ticket->bytes;
if (global_rsv->reserved < global_rsv->size)
global_rsv->full = false;
spin_unlock(&global_rsv->lock);
remove_ticket(space_info, ticket);
ticket->bytes = 0;
wake_up(&ticket->wait);
space_info->tickets_id++;
if (global_rsv->reserved < global_rsv->size)
global_rsv->full = false;
spin_unlock(&global_rsv->lock);
return true;
}