From f94f5ac07983cb53de0c964f5428366c19e81993 Mon Sep 17 00:00:00 2001
From: "Aneesh Kumar K.V (IBM)" <aneesh.kumar@kernel.org>
Date: Wed, 3 Apr 2024 14:06:10 +0530
Subject: [PATCH] powerpc/fadump: Don't update the user-specified memory limit
If the user specifies the memory limit, the kernel should honor it such
that all allocation and reservations are made within the memory limit
specified. fadump was breaking that rule. Remove the code which updates
the memory limit such that fadump reservations are done within the
limit specified.
Signed-off-by: Aneesh Kumar K.V (IBM) <aneesh.kumar@kernel.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20240403083611.172833-2-aneesh.kumar@kernel.org
---
arch/powerpc/kernel/fadump.c | 16 ----------------
1 file changed, 16 deletions(-)
diff --git a/arch/powerpc/kernel/fadump.c b/arch/powerpc/kernel/fadump.c
index d14eda1e85896..4e768d93c6d42 100644
--- a/arch/powerpc/kernel/fadump.c
+++ b/arch/powerpc/kernel/fadump.c
@@ -573,22 +573,6 @@ int __init fadump_reserve_mem(void)
}
}
- /*
- * Calculate the memory boundary.
- * If memory_limit is less than actual memory boundary then reserve
- * the memory for fadump beyond the memory_limit and adjust the
- * memory_limit accordingly, so that the running kernel can run with
- * specified memory_limit.
- */
- if (memory_limit && memory_limit < memblock_end_of_DRAM()) {
- size = get_fadump_area_size();
- if ((memory_limit + size) < memblock_end_of_DRAM())
- memory_limit += size;
- else
- memory_limit = memblock_end_of_DRAM();
- printk(KERN_INFO "Adjusted memory_limit for firmware-assisted"
- " dump, now %#016llx\n", memory_limit);
- }
if (memory_limit)
mem_boundary = memory_limit;
else
--
2.30.2