HMM_MIRROR has less than useful help text

[Pavel Machek]

Hi!

Commit c0b124054f9e42eb6da545a10fe9122a7d7c3f72 has very nice commit
message, explaining what HMM_MIRROR is and when it is
needed. Unfortunately, it did not make it into Kconfig help:

CONFIG_HMM_MIRROR:

Select HMM_MIRROR if you want to mirror range of the CPU page table of
a
process into a device page table. Here, mirror means "keep
synchronized".
Prerequisites: the device must provide the ability to write-protect
its
page tables (at PAGE_SIZE granularity), and must be able to recover
from
the resulting potential page faults.

Could that be fixed?

This is key information for me:

# This is a heterogeneous memory management (HMM) process address space
# mirroring.
# This is useful for NVidia GPU >= Pascal, Mellanox IB >= mlx5 and more
# hardware in the future.

Thanks,
								Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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