[lkml]   [2011]   [Jan]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH 1/2] mm, Make __get_user_pages return -EHWPOISON for HWPOISON page optionally
On 01/13/2011 10:42 AM, Huang Ying wrote:
> Make __get_user_pages return -EHWPOISON for HWPOISON page only if
> FOLL_HWPOISON is specified. With this patch, the interested callers
> can distinguish HWPOISON page from general FAULT page, while other
> callers will still get -EFAULT for pages, so the user space interface
> need not to be changed.
> get_user_pages_hwpoison is added as a variant of get_user_pages that
> can return -EHWPOISON for HWPOISON page.
> This feature is needed by KVM, where UCR MCE should be relayed to
> guest for HWPOISON page, while instruction emulation and MMIO will be
> tried for general FAULT page.
> The idea comes from Andrew Morton.
> Signed-off-by: Huang Ying<>
> Cc: Andrew Morton<>
> +int get_user_pages_hwpoison(struct task_struct *tsk, struct mm_struct *mm,
> + unsigned long start, int nr_pages, int write,
> + int force, struct page **pages,
> + struct vm_area_struct **vmas);
> +#else

Since we'd also like to add get_user_pages_noio(), perhaps adding a
flags field to get_user_pages() is better.

error compiling committee.c: too many arguments to function

 \ /
  Last update: 2011-01-13 11:45    [W:0.035 / U:7.592 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site