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mm,hwpoison: refactor madvise_inject_error

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Make a proper if-else condition for {hard,soft}-offline.

Signed-off-by: Oscar Salvador <osalvador@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Naoya Horiguchi <naoya.horiguchi@nec.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Qian Cai <cai@lca.pw>
Cc: Tony Luck <tony.luck@intel.com>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Aristeu Rozanski <aris@ruivo.org>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Dmitry Yakunin <zeil@yandex-team.ru>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Link: https://lkml.kernel.org/r/20200908075626.11976-3-osalvador@suse.de
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Oscar Salvador 2020-10-15 20:06:53 -07:00 • committed by Linus Torvalds
parent 7e27f22c9e
commit dc7560b496
1 changed files with 13 additions and 17 deletions
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30
mm/madvise.c
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@ -872,7 +872,6 @@ static long madvise_remove(struct vm_area_struct *vma,
static int madvise_inject_error(int behavior,
unsigned long start, unsigned long end)
{
struct page *page;
struct zone *zone;
unsigned long size;
@ -882,6 +881,7 @@ static int madvise_inject_error(int behavior,
for (; start < end; start += size) {
unsigned long pfn;
struct page *page;
int ret;
ret = get_user_pages_fast(start, 1, 0, &page);
@ -903,25 +903,21 @@ static int madvise_inject_error(int behavior,
if (behavior == MADV_SOFT_OFFLINE) {
pr_info("Soft offlining pfn %#lx at process virtual address %#lx\n",
pfn, start);
pfn, start);
ret = soft_offline_page(pfn, MF_COUNT_INCREASED);
if (ret)
return ret;
continue;
} else {
pr_info("Injecting memory failure for pfn %#lx at process virtual address %#lx\n",
pfn, start);
/*
* Drop the page reference taken by get_user_pages_fast(). In
* the absence of MF_COUNT_INCREASED the memory_failure()
* routine is responsible for pinning the page to prevent it
* from being released back to the page allocator.
*/
put_page(page);
ret = memory_failure(pfn, 0);
}
pr_info("Injecting memory failure for pfn %#lx at process virtual address %#lx\n",
pfn, start);
/*
* Drop the page reference taken by get_user_pages_fast(). In
* the absence of MF_COUNT_INCREASED the memory_failure()
* routine is responsible for pinning the page to prevent it
* from being released back to the page allocator.
*/
put_page(page);
ret = memory_failure(pfn, 0);
if (ret)
return ret;
}