Re: [PATCH -next] ovl: respect underlying filesystem's get_unmapped_area()

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On Fri, Dec 13, 2024 at 03:49:53PM +0800, Kefeng Wang wrote:
> 
> 
> On 2024/12/13 12:25, Matthew Wilcox wrote:
> > On Wed, Dec 11, 2024 at 10:43:46AM +0100, Amir Goldstein wrote:
> > > I think this patch is fine as is.
> > 
> > This patch is complete crap.  The test-case is broken.  NAK to all of
> > this.
> > 
> Hi Matthew, regardless of the test case, the original issue is the
> ovl don't respect underlying fs' get_unmapped_area(), the lower fs may
> have own rules for vma alignment(own get_unmapped_area callback),
> thp_get_unmapped_area() is one case, what's your option/suggestion about

No, filesystems don't "have their own rules" for get_unmapped_area.
get_unmapped_area is for device drivers.





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