The patch titled
Subject: powerpc/book3s64/radix: add debug message to give more details of vmemmap allocation
has been added to the -mm mm-unstable branch. Its filename is
powerpc-book3s64-radix-add-debug-message-to-give-more-details-of-vmemmap-allocation.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/powerpc-book3s64-radix-add-debug-message-to-give-more-details-of-vmemmap-allocation.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: "Aneesh Kumar K.V" <aneesh.kumar@xxxxxxxxxxxxx>
Subject: powerpc/book3s64/radix: add debug message to give more details of vmemmap allocation
Date: Tue, 25 Jul 2023 00:37:59 +0530
Add some extra vmemmap pr_debug message that will indicate the type of
vmemmap allocations.
For ex: with DAX vmemmap optimization we can find the below details:
[ 187.166580] radix-mmu: PAGE_SIZE vmemmap mapping
[ 187.166587] radix-mmu: PAGE_SIZE vmemmap mapping
[ 187.166591] radix-mmu: Tail page reuse vmemmap mapping
[ 187.166594] radix-mmu: Tail page reuse vmemmap mapping
[ 187.166598] radix-mmu: Tail page reuse vmemmap mapping
[ 187.166601] radix-mmu: Tail page reuse vmemmap mapping
[ 187.166604] radix-mmu: Tail page reuse vmemmap mapping
[ 187.166608] radix-mmu: Tail page reuse vmemmap mapping
[ 187.166611] radix-mmu: Tail page reuse vmemmap mapping
[ 187.166614] radix-mmu: Tail page reuse vmemmap mapping
[ 187.166617] radix-mmu: Tail page reuse vmemmap mapping
[ 187.166620] radix-mmu: Tail page reuse vmemmap mapping
[ 187.166623] radix-mmu: Tail page reuse vmemmap mapping
[ 187.166626] radix-mmu: Tail page reuse vmemmap mapping
[ 187.166629] radix-mmu: Tail page reuse vmemmap mapping
[ 187.166632] radix-mmu: Tail page reuse vmemmap mapping
And without vmemmap optimization
[ 293.549931] radix-mmu: PMD_SIZE vmemmap mapping
[ 293.549984] radix-mmu: PMD_SIZE vmemmap mapping
[ 293.550032] radix-mmu: PMD_SIZE vmemmap mapping
[ 293.550076] radix-mmu: PMD_SIZE vmemmap mapping
[ 293.550117] radix-mmu: PMD_SIZE vmemmap mapping
Link: https://lkml.kernel.org/r/20230724190759.483013-14-aneesh.kumar@xxxxxxxxxxxxx
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Joao Martins <joao.m.martins@xxxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Cc: Muchun Song <muchun.song@xxxxxxxxx>
Cc: Nicholas Piggin <npiggin@xxxxxxxxx>
Cc: Oscar Salvador <osalvador@xxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/powerpc/mm/book3s64/radix_pgtable.c | 3 +++
1 file changed, 3 insertions(+)
--- a/arch/powerpc/mm/book3s64/radix_pgtable.c~powerpc-book3s64-radix-add-debug-message-to-give-more-details-of-vmemmap-allocation
+++ a/arch/powerpc/mm/book3s64/radix_pgtable.c
@@ -1033,6 +1033,7 @@ static pte_t * __meminit radix__vmemmap_
p = vmemmap_alloc_block_buf(PAGE_SIZE, node, NULL);
if (!p)
return NULL;
+ pr_debug("PAGE_SIZE vmemmap mapping\n");
} else {
/*
* When a PTE/PMD entry is freed from the init_mm
@@ -1045,6 +1046,7 @@ static pte_t * __meminit radix__vmemmap_
*/
get_page(reuse);
p = page_to_virt(reuse);
+ pr_debug("Tail page reuse vmemmap mapping\n");
}
VM_BUG_ON(!PAGE_ALIGNED(addr));
@@ -1154,6 +1156,7 @@ int __meminit radix__vmemmap_populate(un
p = vmemmap_alloc_block_buf(PMD_SIZE, node, altmap);
if (p) {
vmemmap_set_pmd(pmd, p, node, addr, next);
+ pr_debug("PMD_SIZE vmemmap mapping\n");
continue;
} else if (altmap) {
/*
_
Patches currently in -mm which might be from aneesh.kumar@xxxxxxxxxxxxx are
mm-hugepage-pud-allow-arch-specific-helper-function-to-check-huge-page-pud-support.patch
mm-change-pudp_huge_get_and_clear_full-take-vm_area_struct-as-arg.patch
mm-vmemmap-improve-vmemmap_can_optimize-and-allow-architectures-to-override.patch
mm-vmemmap-allow-architectures-to-override-how-vmemmap-optimization-works.patch
mm-add-pud_same-similar-to-__have_arch_p4d_same.patch
mm-huge-pud-use-transparent-huge-pud-helpers-only-with-config_transparent_hugepage.patch
mm-vmemmap-optimization-split-hugetlb-and-devdax-vmemmap-optimization.patch
powerpc-mm-trace-convert-trace-event-to-trace-event-class.patch
powerpc-book3s64-mm-enable-transparent-pud-hugepage.patch
powerpc-book3s64-vmemmap-switch-radix-to-use-a-different-vmemmap-handling-function.patch
powerpc-book3s64-radix-add-support-for-vmemmap-optimization-for-radix.patch
powerpc-book3s64-radix-remove-mmu_vmemmap_psize.patch
powerpc-book3s64-radix-add-debug-message-to-give-more-details-of-vmemmap-allocation.patch
