;, Re: ;, [PATCH v5 3/3] kselftest: ;, mm: introducealloc_isolated_mem;

[Yeoreum Yun]

On Thu, Sep 10, 2026 at 03:14:36PM +0200, David Hildenbrand (Arm) wrote:
> On 9/10/26 14:34, Yeoreum Yun wrote:
> > On Thu, Sep 10, 2026 at 02:25:40PM +0200, David Hildenbrand (Arm) wrote:
> >> On 9/10/26 14:16, Yeoreum Yun wrote:
> >>>
> >>> True. I overlooked guard bit is sticky.
> >>>
> >>>
> >>> It's enough but alloc_isolated_mem() could be modified to allocate with
> >>> PROT_NONE first and then change the prot.
> >>>
> >>> It seems whether make a helper or testcase should write the code
> >>> properly in case of unwanted VMA merge.
> >>>
> >>> IMHO, instead of testcase write them all
> >>
> >> So far I am aware of exactly one test case, which others do absolutely need this?
> > 
> > True. I'll respin with your suggestion.
> 
> Don't get me wrong, if we'll need this for other tests we can add helpers. But
> for a single user adding a helper is not really worth it.

No worries. Since I thought there is no use case right now except the
test, I've agreed.

Thanks!


-- 
Sincerely,
Yeoreum Yun