The quilt patch titled Subject: mm: vmalloc: actually use the in-place vrealloc region has been removed from the -mm tree. Its filename was mm-vmalloc-actually-use-the-in-place-vrealloc-region.patch
This patch was dropped because it was merged into the mm-hotfixes-stable branch of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------ From: Kees Cook kees@kernel.org Subject: mm: vmalloc: actually use the in-place vrealloc region Date: Thu, 15 May 2025 14:42:15 -0700
Patch series "mm: vmalloc: Actually use the in-place vrealloc region".
This fixes a performance regression[1] with vrealloc()[1].
The refactoring to not build a new vmalloc region only actually worked when shrinking. Actually return the resized area when it grows. Ugh.
Link: https://lkml.kernel.org/r/20250515214217.619685-1-kees@kernel.org Fixes: a0309faf1cb0 ("mm: vmalloc: support more granular vrealloc() sizing") Signed-off-by: Kees Cook kees@kernel.org Reported-by: Shung-Hsi Yu shung-hsi.yu@suse.com Closes: https://lore.kernel.org/all/20250515-bpf-verifier-slowdown-vwo2meju4cgp2su5c... [1] Tested-by: Eduard Zingerman eddyz87@gmail.com Tested-by: Pawan Gupta pawan.kumar.gupta@linux.intel.com Tested-by: Shung-Hsi Yu shung-hsi.yu@suse.com Reviewed-by: "Uladzislau Rezki (Sony)" urezki@gmail.com Reviewed-by: Danilo Krummrich dakr@kernel.org Cc: "Erhard F." erhard_f@mailbox.org Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org ---
mm/vmalloc.c | 1 + 1 file changed, 1 insertion(+)
--- a/mm/vmalloc.c~mm-vmalloc-actually-use-the-in-place-vrealloc-region +++ a/mm/vmalloc.c @@ -4111,6 +4111,7 @@ void *vrealloc_noprof(const void *p, siz if (want_init_on_alloc(flags)) memset((void *)p + old_size, 0, size - old_size); vm->requested_size = size; + return (void *)p; }
/* TODO: Grow the vm_area, i.e. allocate and map additional pages. */ _
Patches currently in -mm which might be from kees@kernel.org are