Re: [RFC PATCH v2 03/16] mm,madvise: Refactor madvise_inject_error

2019-10-21 Thread Naoya Horiguchi
On Thu, Oct 17, 2019 at 04:21:10PM +0200, Oscar Salvador wrote:
> Make a proper if-else condition for {hard,soft}-offline.
> 
> Signed-off-by: Oscar Salvador 

Acked-by: Naoya Horiguchi 


[RFC PATCH v2 03/16] mm,madvise: Refactor madvise_inject_error

2019-10-17 Thread Oscar Salvador
Make a proper if-else condition for {hard,soft}-offline.

Signed-off-by: Oscar Salvador 
---
 mm/madvise.c | 16 ++--
 1 file changed, 6 insertions(+), 10 deletions(-)

diff --git a/mm/madvise.c b/mm/madvise.c
index 89ed9a22ff4f..b765860a5d04 100644
--- a/mm/madvise.c
+++ b/mm/madvise.c
@@ -854,16 +854,15 @@ 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 int order;
 
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
 
-
for (; start < end; start += PAGE_SIZE << order) {
unsigned long pfn;
+   struct page *page;
int ret;
 
ret = get_user_pages_fast(start, 1, 0, &page);
@@ -893,17 +892,14 @@ 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(page, 0);
-   if (ret)
-   return ret;
-   continue;
+   } else {
+   pr_info("Injecting memory failure for pfn %#lx at 
process virtual address %#lx\n",
+pfn, start);
+   ret = memory_failure(pfn, 0);
}
 
-   pr_info("Injecting memory failure for pfn %#lx at process 
virtual address %#lx\n",
-   pfn, start);
-   ret = memory_failure(pfn, 0);
if (ret)
return ret;
}
-- 
2.12.3