Commit d2734f04 authored Mar 12, 2025 by Shuai Xue Committed by Andrew Morton Mar 17, 2025

mm: memory-failure: enhance comments for return value of memory_failure()

The comments for the return value of memory_failure are not complete,
supplement the comments.

Link: https://lkml.kernel.org/r/20250312112852.82415-4-xueshuai@linux.alibaba.com


Signed-off-by: Shuai Xue <xueshuai@linux.alibaba.com>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Yazen Ghannam <yazen.ghannam@amd.com>
Reviewed-by: Jane Chu <jane.chu@oracle.com>
Acked-by: Miaohe Lin <linmiaohe@huawei.com>
Tested-by: Tony Luck <tony.luck@intel.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Borislav Betkov <bp@alien8.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Josh Poimboeuf <jpoimboe@kernel.org>
Cc: Naoya Horiguchi <nao.horiguchi@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ruidong Tian <tianruidong@linux.alibaba.com>
Cc: Thomas Gleinxer <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

parent aaf99ac2

mm/memory-failure.c

+7 −3

Original line number	Diff line number	Diff line
		@@ -2215,9 +2215,13 @@ static void kill_procs_now(struct page *p, unsigned long pfn, int flags,
		* Must run in process context (e.g. a work queue) with interrupts
		* enabled and no spinlocks held.
		*
		* Return: 0 for successfully handled the memory error,
		* -EOPNOTSUPP for hwpoison_filter() filtered the error event,
		* < 0(except -EOPNOTSUPP) on failure.
		* Return:
		* 0 - success,
		* -ENXIO - memory not managed by the kernel
		* -EOPNOTSUPP - hwpoison_filter() filtered the error event,
		* -EHWPOISON - the page was already poisoned, potentially
		* kill process,
		* other negative values - failure.
		*/
		int memory_failure(unsigned long pfn, int flags)
		{