On Thu, Aug 06, 2020 at 06:49:23PM +0000, nao.horiguchi@xxxxxxxxx wrote: > From: Naoya Horiguchi <naoya.horiguchi@xxxxxxx> > > Soft offlining could fail with EIO due to the race condition with > hugepage migration. This issuse became visible due to the change by > previous patch that makes soft offline handler take page refcount > by its own. We have no way to directly pin zero refcount page, and > the page considered as a zero refcount page could be allocated just > after the first check. > > This patch adds the second check to find the race and gives us > chance to handle it more reliably. > > Reported-by: Qian Cai <cai@xxxxxx> > Signed-off-by: Naoya Horiguchi <naoya.horiguchi@xxxxxxx> Reviewed-by: Oscar Salvador <osalvador@xxxxxxx> -- Oscar Salvador SUSE L3
