The patch titled Subject: mm: huge_memory: use !CONFIG_64BIT to relax huge page alignment on 32 bit machines has been added to the -mm mm-hotfixes-unstable branch. Its filename is mm-huge_memory-use-config_64bit-to-relax-huge-page-alignment-on-32-bit-machines.patch

This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches...

This patch will later appear in the mm-hotfixes-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------ From: Yang Shi yang@os.amperecomputing.com Subject: mm: huge_memory: use !CONFIG_64BIT to relax huge page alignment on 32 bit machines Date: Fri, 12 Jul 2024 08:58:55 -0700

Yves-Alexis Perez reported commit 4ef9ad19e176 ("mm: huge_memory: don't force huge page alignment on 32 bit") didn't work for x86_32 [1]. It is because x86_32 uses CONFIG_X86_32 instead of CONFIG_32BIT.

!CONFIG_64BIT should cover all 32 bit machines.

[1] https://lore.kernel.org/linux-mm/CAHbLzkr1LwH3pcTgM+aGQ31ip2bKqiqEQ8=FQB+t2c...

Link: https://lkml.kernel.org/r/20240712155855.1130330-1-yang@os.amperecomputing.c... Fixes: 4ef9ad19e176 ("mm: huge_memory: don't force huge page alignment on 32 bit") Signed-off-by: Yang Shi yang@os.amperecomputing.com Reported-by: Yves-Alexis Perez corsac@debian.org Tested-by: Yves-Alexis Perez corsac@debian.org Cc: Ben Hutchings ben@decadent.org.uk Cc: Christoph Lameter cl@linux.com Cc: Jiri Slaby jirislaby@kernel.org Cc: Matthew Wilcox (Oracle) willy@infradead.org Cc: Rik van Riel riel@surriel.com Cc: Salvatore Bonaccorso carnil@debian.org Cc: Suren Baghdasaryan surenb@google.com Cc: stable@vger.kernel.org [6.8+] Signed-off-by: Andrew Morton akpm@linux-foundation.org ---

mm/huge_memory.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/mm/huge_memory.c~mm-huge_memory-use-config_64bit-to-relax-huge-page-alignment-on-32-bit-machines +++ a/mm/huge_memory.c @@ -858,7 +858,7 @@ static unsigned long __thp_get_unmapped_ loff_t off_align = round_up(off, size); unsigned long len_pad, ret, off_sub;

- if (IS_ENABLED(CONFIG_32BIT) || in_compat_syscall()) + if (!IS_ENABLED(CONFIG_64BIT) || in_compat_syscall()) return 0;

if (off_end <= off_align || (off_end - off_align) < size) _

Patches currently in -mm which might be from yang@os.amperecomputing.com are

mm-huge_memory-use-config_64bit-to-relax-huge-page-alignment-on-32-bit-machines.patch