[PATCH] block: avoild hang when bio_list is non-NULL in submit_bio_wait()

[Jiucheng Xu]

On 3/3/2026 10:11 AM, Gao Xiang wrote:
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> On 2026/3/3 10:03, Jiucheng Xu wrote:
>>
>>
> 
> ...
> 
>>>
>>>> that need to use GFP_NOIO.
>>>
>>> Yes, it should make vm_map_ram() in the end_io path use
>>> GFP_NOIO instead.
>>>
>>> Jiucheng, could you add memalloc_noio_{save,restore}() to
>>> wrap up this path?
>>
>> Thanks for Christoph's and Xiang's comments, I will try it. Thanks!
> 
> Just one more note: just wrap up z_erofs_decompressqueue_work() in
> z_erofs_decompress_kickoff() with memalloc_noio_{save,restore}() is
> enough.
> 
>   ...
>   memalloc_noio_save()
>   z_erofs_decompressqueue_work()
>   memalloc_noio_restore()
Got it, thanks for the details!