Re: WARNING in memory_failure() at include/linux/huge_mm.h:635 triggered

[Zi Yan]

On 4 Feb 2026, at 16:37, David Hildenbrand (arm) wrote:

> On 2/4/26 22:08, Zi Yan wrote:
>> On 4 Feb 2026, at 14:18, David Hildenbrand (arm) wrote:
>>
>>> On 2/4/26 18:41, Zi Yan wrote:
>>>>
>>>>
>>>> More details:
>>>> later at sg_vma_fault(), the driver just handles a page fault by supplying
>>>> a subpage from a pre-allocated compound page[3]. We then get a large folio
>>>> without !CONFIG_TRANSPARENT_HUGEPAGE.
>>>
>>> We can identify such non-folio (but compound) things by looking at PG_large_rmappable IIRC.
>>
>> OK, back to the issue. The patch below should fix the issue?
>>
>> Hi 是参差,
>>
>> Can you test it?
>>

<snip>
> I think you have to test for folio_test_large() before testing folio_test_large_rmappable().

Oh, forgot that. Thanks.