From: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
To: linuxppc-dev@lists.ozlabs.org, mpe@ellerman.id.au,
npiggin@gmail.com, christophe.leroy@csgroup.eu
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>,
Dan Williams <dan.j.williams@intel.com>,
David Hildenbrand <david@redhat.com>
Subject: [PATCH] powerpc/mm/altmap: Fix altmap boundary check
Date: Mon, 24 Jul 2023 23:43:20 +0530 [thread overview]
Message-ID: <20230724181320.471386-1-aneesh.kumar@linux.ibm.com> (raw)
altmap->free includes the entire free space from which altmap blocks
can be allocated. So when checking whether the kernel is doing altmap
block free, compute the boundary correctly.
Cc: David Hildenbrand <david@redhat.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Fixes: 9ef34630a461 ("powerpc/mm: Fallback to RAM if the altmap is unusable")
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
---
arch/powerpc/mm/init_64.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/arch/powerpc/mm/init_64.c b/arch/powerpc/mm/init_64.c
index fe1b83020e0d..0ec5b45b1e86 100644
--- a/arch/powerpc/mm/init_64.c
+++ b/arch/powerpc/mm/init_64.c
@@ -314,8 +314,7 @@ void __ref vmemmap_free(unsigned long start, unsigned long end,
start = ALIGN_DOWN(start, page_size);
if (altmap) {
alt_start = altmap->base_pfn;
- alt_end = altmap->base_pfn + altmap->reserve +
- altmap->free + altmap->alloc + altmap->align;
+ alt_end = altmap->base_pfn + altmap->reserve + altmap->free;
}
pr_debug("vmemmap_free %lx...%lx\n", start, end);
--
2.41.0
next reply other threads:[~2023-07-24 18:14 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-24 18:13 Aneesh Kumar K.V [this message]
2023-07-24 18:22 ` [PATCH] powerpc/mm/altmap: Fix altmap boundary check David Hildenbrand
2023-07-29 7:48 ` Michael Ellerman
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