Messages in this thread | | | From | David Howells <> | Subject | Re: [PATCH] fix race in mark_mounts_for_expiry() | Date | Wed, 18 May 2005 11:32:34 +0100 |
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Miklos Szeredi <miklos@szeredi.hu> wrote:
> > How about this patch? It tries to solve this race without additional > locking. If refcount is already zero, it will increment and decrement > it. So be careful to only call grab_namespace() with vfsmount_lock > held, otherwise it could race with itself. (vfsmount_lock is also > needed in this case so that mnt->mnt_namespace, doesn't change, while > grabbing the namespace)
How about using cmpxchg?
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