Re: [PATCH RFCv2] mm/madvise: introduce MADV_POPULATE_(READ|WRITE) to prefault/prealloc memory

[Kirill A. Shutemov]

On Mon, Mar 15, 2021 at 01:25:40PM +0100, David Hildenbrand wrote:
> On 15.03.21 13:22, Kirill A. Shutemov wrote:
> > On Mon, Mar 08, 2021 at 05:45:20PM +0100, David Hildenbrand wrote:
> > > +			case -EHWPOISON: /* Skip over any poisoned pages. */
> > > +				start += PAGE_SIZE;
> > > +				continue;
> > 
> > Why is it good approach? It's not abvious to me.
> 
> My main motivation was to simplify return code handling. I don't want to
> return -EHWPOISON to user space

Why? Hiding the problem under the rug doesn't help anybody. SIGBUS later
is not better than an error upfront.

-- 
 Kirill A. Shutemov