Re: [PATCH 1/4] mm,hwpoison: Take free pages off the buddy freelists

2020-09-04 Thread Oscar Salvador
On Fri, Sep 04, 2020 at 02:02:05AM +, HORIGUCHI NAOYA(堀口 直也) wrote: > On Wed, Sep 02, 2020 at 11:45:07AM +0200, Oscar Salvador wrote: > > The crux of the matter is that historically we left poisoned pages > > in the buddy system because we have some checks in place when > > allocating a page

Re: [PATCH 1/4] mm,hwpoison: Take free pages off the buddy freelists

2020-09-03 Thread 堀口　直也
On Wed, Sep 02, 2020 at 11:45:07AM +0200, Oscar Salvador wrote: > The crux of the matter is that historically we left poisoned pages > in the buddy system because we have some checks in place when > allocating a page that a gatekeeper for poisoned pages. > Unfortunately, we do have other users

[PATCH 1/4] mm,hwpoison: Take free pages off the buddy freelists

2020-09-02 Thread Oscar Salvador
The crux of the matter is that historically we left poisoned pages in the buddy system because we have some checks in place when allocating a page that a gatekeeper for poisoned pages. Unfortunately, we do have other users (e.g: compaction [1]) that scan buddy freelists and try to get a page from