From: Zhang Jian <zhangjian210@huawei.com> ascend inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I53VVE CVE: NA ------------------------------------------------- Collect the processes who have the page mapped via collect_procs(). @page if the page is a part of the hugepages/compound-page, we must using compound_head() to find it's head page to prevent the kernel panic, and make the page be locked. @to_kill the function will return a linked list, when we have used this list, we must kfree the list. @force_early if we want to find all process, we must make it be true, if it's false, the function will only return the process who have PF_MCE_PROCESS or PF_MCE_EARLY mark. limits: if force_early is true, sysctl_memory_failure_early_kill is useless. If it's false, no process have PF_MCE_PROCESS and PF_MCE_EARLY flag, and the sysctl_memory_failure_early_kill is enabled, function will return all tasks whether the task have the PF_MCE_PROCESS and PF_MCE_EARLY flag. Signed-off-by: Zhang Jian <zhangjian210@huawei.com> Reviewed-by: Weilong Chen <chenweilong@huawei.com> Reviewed-by: Kefeng Wang<wangkefeng.wang@huawei.com> Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Reviewed-by: Weilong Chen <chenweilong@huawei.com> Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com> --- include/linux/mm.h | 3 ++- mm/memory-failure.c | 3 ++- 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/include/linux/mm.h b/include/linux/mm.h index 859d5200c57b..a886f48b6a0e 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -3109,7 +3109,8 @@ extern int sysctl_memory_failure_recovery; extern void shake_page(struct page *p, int access); extern atomic_long_t num_poisoned_pages __read_mostly; extern int soft_offline_page(unsigned long pfn, int flags); - +extern void collect_procs(struct page *page, struct list_head *tokill, + int force_early); /* * Error handlers for various types of pages. diff --git a/mm/memory-failure.c b/mm/memory-failure.c index fb74e61e5aa4..509fe34a0421 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -541,7 +541,7 @@ static void collect_procs_file(struct page *page, struct list_head *to_kill, /* * Collect the processes who have the corrupted page mapped to kill. */ -static void collect_procs(struct page *page, struct list_head *tokill, +void collect_procs(struct page *page, struct list_head *tokill, int force_early) { if (!page->mapping) @@ -552,6 +552,7 @@ static void collect_procs(struct page *page, struct list_head *tokill, else collect_procs_file(page, tokill, force_early); } +EXPORT_SYMBOL_GPL(collect_procs); static const char *action_name[] = { [MF_IGNORED] = "Ignored", -- 2.20.1