Re: [PATCH 2/2] x86/vdso: Add VCLOCK_HVCLOCK vDSO clock read method

Vitaly Kuznetsov
2017-02-10T12:25:36Z

Stephen Hemminger <sthemmin@microsoft.com> writes:

> Why not use existing seqlock's?
>

To be honest I don't quite understand how we could use it -- the
sequence locking here is done against the page updated by the
hypersior, we're not creating new structures (so I don't understand how
we could use struct seqcount which we don't have) but I may be
misunderstanding something.

BTW, I just occured to me that I should've probably put the TSC reading
code to mshyperv.h and use it from both vDSO and read_hv_clock_tsc() --
what do you thing?

[snip]

--
Vitaly