Re: [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!