On Thu, Mar 24, 2016 at 2:18 PM, Yan, Zheng <zyan@xxxxxxxxxx> wrote:
>
>> On Mar 24, 2016, at 18:26, Ilya Dryomov <idryomov@xxxxxxxxx> wrote:
[ snip ]
>> TBH I still can't wrap my head around lockless layout/namespace pointer
>> updates and how that can ever work reliably…
>
> see Documentation/RCU/rcuref.txt. How RCU is used in my code is similar to the second example.
It's the higher-level cephfs code and installing new namespaces in the
middle of whatever else that might be going on that I'm worried about.
See my other mail, I'd like to hear what exactly is being achieved with
this approach and have you considered reusing i_ceph_lock (or others,
of which there are plenty).
Thanks,
Ilya
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