Re: RFC: Fix f_flags races without the BKL

[Andi Kleen]

> > Now we have the global mutex for ->fasync... Well, not very
> > good but fasync_helper() takes fasync_lock anyway.
> 
> Not very good, but does anybody know of a workload which would result in
> that mutex being contended ever?

I presume it could be a problem on a program that uses asynchronous sockets
multi threaded. At some point that used to be a common pattern for
network servers like squid (not saying that it's necessarily contended
in squid itself)

-andi

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