Re: [PATCH v2 2/2] task_mmu: Add user-space support for resetting mm->hiwater_rss (peak RSS)

[Kirill A. Shutemov]

On Wed, Jan 07, 2015 at 05:06:54PM +0000, Petr Cermak wrote:
> Peak resident size of a process can be reset by writing "5" to
> /proc/pid/clear_refs. The driving use-case for this would be getting the
> peak RSS value, which can be retrieved from the VmHWM field in
> /proc/pid/status, per benchmark iteration or test scenario.

And how it's not an ABI break?

We have never-lowering VmHWM for 9+ years. How can you know that nobody
expects this behaviour?

And why do you reset hiwater_rss, but not hiwater_vm?

-- 
 Kirill A. Shutemov
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