[PATCH 38/46] mm: smaps: add stats for HugeTLB mapping size
From: James Houghton
Date: Thu Jan 05 2023 - 05:23:15 EST
When the kernel is compiled with HUGETLB_HIGH_GRANULARITY_MAPPING,
smaps may provide HugetlbPudMapped, HugetlbPmdMapped, and
HugetlbPteMapped. Levels that are folded will not be outputted.
Signed-off-by: James Houghton <jthoughton@xxxxxxxxxx>
---
fs/proc/task_mmu.c | 101 +++++++++++++++++++++++++++++++++------------
1 file changed, 75 insertions(+), 26 deletions(-)
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index c353cab11eee..af31c4d314d2 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -412,6 +412,15 @@ struct mem_size_stats {
unsigned long swap;
unsigned long shared_hugetlb;
unsigned long private_hugetlb;
+#ifdef CONFIG_HUGETLB_HIGH_GRANULARITY_MAPPING
+#ifndef __PAGETABLE_PUD_FOLDED
+ unsigned long hugetlb_pud_mapped;
+#endif
+#ifndef __PAGETABLE_PMD_FOLDED
+ unsigned long hugetlb_pmd_mapped;
+#endif
+ unsigned long hugetlb_pte_mapped;
+#endif
u64 pss;
u64 pss_anon;
u64 pss_file;
@@ -731,6 +740,35 @@ static void show_smap_vma_flags(struct seq_file *m, struct vm_area_struct *vma)
}
#ifdef CONFIG_HUGETLB_PAGE
+
+static void smaps_hugetlb_hgm_account(struct mem_size_stats *mss,
+ struct hugetlb_pte *hpte)
+{
+#ifdef CONFIG_HUGETLB_HIGH_GRANULARITY_MAPPING
+ unsigned long size = hugetlb_pte_size(hpte);
+
+ switch (hpte->level) {
+#ifndef __PAGETABLE_PUD_FOLDED
+ case HUGETLB_LEVEL_PUD:
+ mss->hugetlb_pud_mapped += size;
+ break;
+#endif
+#ifndef __PAGETABLE_PMD_FOLDED
+ case HUGETLB_LEVEL_PMD:
+ mss->hugetlb_pmd_mapped += size;
+ break;
+#endif
+ case HUGETLB_LEVEL_PTE:
+ mss->hugetlb_pte_mapped += size;
+ break;
+ default:
+ break;
+ }
+#else
+ return;
+#endif /* CONFIG_HUGETLB_HIGH_GRANULARITY_MAPPING */
+}
+
static int smaps_hugetlb_range(struct hugetlb_pte *hpte,
unsigned long addr,
struct mm_walk *walk)
@@ -764,6 +802,8 @@ static int smaps_hugetlb_range(struct hugetlb_pte *hpte,
mss->shared_hugetlb += hugetlb_pte_size(hpte);
else
mss->private_hugetlb += hugetlb_pte_size(hpte);
+
+ smaps_hugetlb_hgm_account(mss, hpte);
}
return 0;
}
@@ -833,38 +873,47 @@ static void smap_gather_stats(struct vm_area_struct *vma,
static void __show_smap(struct seq_file *m, const struct mem_size_stats *mss,
bool rollup_mode)
{
- SEQ_PUT_DEC("Rss: ", mss->resident);
- SEQ_PUT_DEC(" kB\nPss: ", mss->pss >> PSS_SHIFT);
- SEQ_PUT_DEC(" kB\nPss_Dirty: ", mss->pss_dirty >> PSS_SHIFT);
+ SEQ_PUT_DEC("Rss: ", mss->resident);
+ SEQ_PUT_DEC(" kB\nPss: ", mss->pss >> PSS_SHIFT);
+ SEQ_PUT_DEC(" kB\nPss_Dirty: ", mss->pss_dirty >> PSS_SHIFT);
if (rollup_mode) {
/*
* These are meaningful only for smaps_rollup, otherwise two of
* them are zero, and the other one is the same as Pss.
*/
- SEQ_PUT_DEC(" kB\nPss_Anon: ",
+ SEQ_PUT_DEC(" kB\nPss_Anon: ",
mss->pss_anon >> PSS_SHIFT);
- SEQ_PUT_DEC(" kB\nPss_File: ",
+ SEQ_PUT_DEC(" kB\nPss_File: ",
mss->pss_file >> PSS_SHIFT);
- SEQ_PUT_DEC(" kB\nPss_Shmem: ",
+ SEQ_PUT_DEC(" kB\nPss_Shmem: ",
mss->pss_shmem >> PSS_SHIFT);
}
- SEQ_PUT_DEC(" kB\nShared_Clean: ", mss->shared_clean);
- SEQ_PUT_DEC(" kB\nShared_Dirty: ", mss->shared_dirty);
- SEQ_PUT_DEC(" kB\nPrivate_Clean: ", mss->private_clean);
- SEQ_PUT_DEC(" kB\nPrivate_Dirty: ", mss->private_dirty);
- SEQ_PUT_DEC(" kB\nReferenced: ", mss->referenced);
- SEQ_PUT_DEC(" kB\nAnonymous: ", mss->anonymous);
- SEQ_PUT_DEC(" kB\nLazyFree: ", mss->lazyfree);
- SEQ_PUT_DEC(" kB\nAnonHugePages: ", mss->anonymous_thp);
- SEQ_PUT_DEC(" kB\nShmemPmdMapped: ", mss->shmem_thp);
- SEQ_PUT_DEC(" kB\nFilePmdMapped: ", mss->file_thp);
- SEQ_PUT_DEC(" kB\nShared_Hugetlb: ", mss->shared_hugetlb);
- seq_put_decimal_ull_width(m, " kB\nPrivate_Hugetlb: ",
+ SEQ_PUT_DEC(" kB\nShared_Clean: ", mss->shared_clean);
+ SEQ_PUT_DEC(" kB\nShared_Dirty: ", mss->shared_dirty);
+ SEQ_PUT_DEC(" kB\nPrivate_Clean: ", mss->private_clean);
+ SEQ_PUT_DEC(" kB\nPrivate_Dirty: ", mss->private_dirty);
+ SEQ_PUT_DEC(" kB\nReferenced: ", mss->referenced);
+ SEQ_PUT_DEC(" kB\nAnonymous: ", mss->anonymous);
+ SEQ_PUT_DEC(" kB\nLazyFree: ", mss->lazyfree);
+ SEQ_PUT_DEC(" kB\nAnonHugePages: ", mss->anonymous_thp);
+ SEQ_PUT_DEC(" kB\nShmemPmdMapped: ", mss->shmem_thp);
+ SEQ_PUT_DEC(" kB\nFilePmdMapped: ", mss->file_thp);
+ SEQ_PUT_DEC(" kB\nShared_Hugetlb: ", mss->shared_hugetlb);
+ seq_put_decimal_ull_width(m, " kB\nPrivate_Hugetlb: ",
mss->private_hugetlb >> 10, 7);
- SEQ_PUT_DEC(" kB\nSwap: ", mss->swap);
- SEQ_PUT_DEC(" kB\nSwapPss: ",
+#ifdef CONFIG_HUGETLB_HIGH_GRANULARITY_MAPPING
+#ifndef __PAGETABLE_PUD_FOLDED
+ SEQ_PUT_DEC(" kB\nHugetlbPudMapped: ", mss->hugetlb_pud_mapped);
+#endif
+#ifndef __PAGETABLE_PMD_FOLDED
+ SEQ_PUT_DEC(" kB\nHugetlbPmdMapped: ", mss->hugetlb_pmd_mapped);
+#endif
+ SEQ_PUT_DEC(" kB\nHugetlbPteMapped: ", mss->hugetlb_pte_mapped);
+#endif /* CONFIG_HUGETLB_HIGH_GRANULARITY_MAPPING */
+ SEQ_PUT_DEC(" kB\nSwap: ", mss->swap);
+ SEQ_PUT_DEC(" kB\nSwapPss: ",
mss->swap_pss >> PSS_SHIFT);
- SEQ_PUT_DEC(" kB\nLocked: ",
+ SEQ_PUT_DEC(" kB\nLocked: ",
mss->pss_locked >> PSS_SHIFT);
seq_puts(m, " kB\n");
}
@@ -880,18 +929,18 @@ static int show_smap(struct seq_file *m, void *v)
show_map_vma(m, vma);
- SEQ_PUT_DEC("Size: ", vma->vm_end - vma->vm_start);
- SEQ_PUT_DEC(" kB\nKernelPageSize: ", vma_kernel_pagesize(vma));
- SEQ_PUT_DEC(" kB\nMMUPageSize: ", vma_mmu_pagesize(vma));
+ SEQ_PUT_DEC("Size: ", vma->vm_end - vma->vm_start);
+ SEQ_PUT_DEC(" kB\nKernelPageSize: ", vma_kernel_pagesize(vma));
+ SEQ_PUT_DEC(" kB\nMMUPageSize: ", vma_mmu_pagesize(vma));
seq_puts(m, " kB\n");
__show_smap(m, &mss, false);
- seq_printf(m, "THPeligible: %d\n",
+ seq_printf(m, "THPeligible: %d\n",
hugepage_vma_check(vma, vma->vm_flags, true, false, true));
if (arch_pkeys_enabled())
- seq_printf(m, "ProtectionKey: %8u\n", vma_pkey(vma));
+ seq_printf(m, "ProtectionKey: %8u\n", vma_pkey(vma));
show_smap_vma_flags(m, vma);
return 0;
--
2.39.0.314.g84b9a713c41-goog