Messages in this thread | | | Date | Thu, 20 Nov 2014 18:05:03 +0000 | From | Al Viro <> | Subject | Re: Potential data race in dput and __d_lookup |
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On Thu, Nov 20, 2014 at 09:20:14PM +0400, Andrey Konovalov wrote:
> It seems that one thread increments 'dentry->d_lockref.count', while > other does 'lockref_put_or_lock(&dentry->d_lockref)' without any > synchronization. > > Could you confirm if this is a real race?
I can not. Increment in __d_lookup() is under ->d_lockref.lock (aka ->d_lock) and lockref_put_or_lock() is atomic wrt that.
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