Re: dcache shrink list corruption?

[Al Viro]

On Wed, Apr 30, 2014 at 04:04:58PM -0700, Linus Torvalds wrote:
> On Wed, Apr 30, 2014 at 3:12 PM, Al Viro <viro@xxxxxxxxxxxxxxxxxx> wrote:
> >
> > I've just pushed the whole thing to vfs.git#for-linus;
> > review and testing would be very welcome.
> 
> I have no half-way relevant test-case for this, so I'm hoping people
> who have good VFS stress-tests (preferably under memory pressure so
> that we get that whole shrinking path) will test.
> 
> But it looks fine.
> 
> That said, I do hate that RCU read-lock around the final spin-unlock.

So do I, obviously...  After looking through the rest of arch_spin_unlock(),
it looks like the only suspicious one except the paravirt on x86 is
blackfin.  And that might be misreading - I'm not familiar enough with the
architecture to tell...
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