On Fri, Nov 26, 2021 at 03:32:26PM +0800, Yang Wei wrote:
> From: Yang Wei <yang.wei@xxxxxxxxxxxxxxxxx>
>
> We found _set_memory_array() and set_memory_array_wb() takes more than
> 500ms in kernel space in the following scenario.
> So use this patch to trigger schedule for each page, to avoid other
> threads getting stuck.
>
> 0xffffffff810a34d2 find_next_iomem_res ([kernel.kallsyms])
> 0xffffffff810a3d40 walk_system_ram_range ([kernel.kallsyms])
> 0xffffffff810772ca pat_pagerange_is_ram ([kernel.kallsyms])
> 0xffffffff8107796f reserve_memtype ([kernel.kallsyms])
> 0xffffffff81075e98 _set_memory_array ([kernel.kallsyms])
> 0xffffffffc0ef6083 nv_alloc_system_pages [nvidia] ([kernel.kallsyms])
>
> 0xffffffff810a34d2 find_next_iomem_res ([kernel.kallsyms])
> 0xffffffff810a3d40 walk_system_ram_range ([kernel.kallsyms])
> 0xffffffff810772ca pat_pagerange_is_ram ([kernel.kallsyms])
> 0xffffffff8107745a free_memtype.part.7 ([kernel.kallsyms])
> 0xffffffff8107606e set_memory_array_wb ([kernel.kallsyms])
> 0xffffffffc0ef6291 nv_free_system_pages [nvidia]([kernel.kallsyms])
>
> Signed-off-by: Yang Wei <yang.wei@xxxxxxxxxxxxxxxxx>
> Tested-by: Yang Wei <yang.wei@xxxxxxxxxxxxxxxxx>
> ---
> arch/x86/mm/pageattr.c | 2 ++
> 1 file changed, 2 insertions(+)
<formletter>
This is not the correct way to submit patches for inclusion in the
stable kernel tree. Please read:
https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html
for how to do this properly.
</formletter>
