Re: [RFC PATCHv2 2/2] Change khugepaged to respect MMF_THP_DISABLEflag
From: Oleg Nesterov
Date: Mon Jan 20 2014 - 15:16:06 EST
On 01/20, Alex Thorlton wrote:
> No, definitely not. Upon review, khugepaged_test_exit is the wrong
> place to do this check. I think I need to move it up to
> khugepaged_scan_mm_slot for this to work correctly.
Why? unless a MMF_THP_DISABLE task does madvise(MADV_HUGEPAGE)
khugepaged_scan_mm_slot() should never see its ->mm ?
Although I got lost a bit, and probably misunderstood... but it
seems to me that whatever you do this patch should not touch
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