Le 19/09/2022 à 03:44, Nicholas Miehlbradt a écrit :
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>
> There is support for DEBUG_PAGEALLOC on hash but not on radix.
> Add support on radix.
>
> Signed-off-by: Nicholas Miehlbradt <nicholas at linux.ibm.com>
> ---
> arch/powerpc/mm/book3s64/radix_pgtable.c | 16 +++++++++++++++-
> 1 file changed, 15 insertions(+), 1 deletion(-)
>
> diff --git a/arch/powerpc/mm/book3s64/radix_pgtable.c b/arch/powerpc/mm/book3s64/radix_pgtable.c
> index db2f3d193448..483c99bfbde5 100644
> --- a/arch/powerpc/mm/book3s64/radix_pgtable.c
> +++ b/arch/powerpc/mm/book3s64/radix_pgtable.c
> @@ -30,6 +30,7 @@
> #include <asm/trace.h>
> #include <asm/uaccess.h>
> #include <asm/ultravisor.h>
> +#include <asm/set_memory.h>
>
> #include <trace/events/thp.h>
>
> @@ -503,6 +504,9 @@ static unsigned long __init radix_memory_block_size(void)
> {
> unsigned long mem_block_size = MIN_MEMORY_BLOCK_SIZE;
>
> + if (debug_pagealloc_enabled())
> + return PAGE_SIZE;
> +
> /*
> * OPAL firmware feature is set by now. Hence we are ok
> * to test OPAL feature.
> @@ -519,6 +523,9 @@ static unsigned long __init radix_memory_block_size(void)
>
> static unsigned long __init radix_memory_block_size(void)
> {
> + if (debug_pagealloc_enabled())
> + return PAGE_SIZE;
> +
> return 1UL * 1024 * 1024 * 1024;
While at it, maybe you can replace the above by SZ_1G
> }
>
> @@ -899,7 +906,14 @@ void __meminit radix__vmemmap_remove_mapping(unsigned long start, unsigned long
> #ifdef CONFIG_DEBUG_PAGEALLOC
> void radix__kernel_map_pages(struct page *page, int numpages, int enable)
> {
> - pr_warn_once("DEBUG_PAGEALLOC not supported in radix mode\n");
> + unsigned long addr;
> +
> + addr = (unsigned long)page_address(page);
> +
> + if (enable)
> + set_memory_p(addr, numpages);
> + else
> + set_memory_np(addr, numpages);
> }
> #endif
>
> --
> 2.34.1
>