50 lines
1.6 KiB
Diff
50 lines
1.6 KiB
Diff
From 699717c7720cb2a397ce59d0a0380c65d2693033 Mon Sep 17 00:00:00 2001
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From: Lianbo Jiang <lijiang@redhat.com>
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Date: Fri, 23 Dec 2022 18:42:35 +0800
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Subject: [PATCH 61/89] Fix for "kmem -i" to display correct SLAB statistics on
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Linux 5.9 and later
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Kernel commit d42f3245c7e2 ("mm: memcg: convert vmstat slab counters to
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bytes"), which is contained in Linux v5.9-rc1 and later kernels, renamed
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NR_SLAB_{RECLAIMABLE,UNRECLAIMABLE} to NR_SLAB_{RECLAIMABLE,UNRECLAIMABLE}_B.
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Without the patch, "kmem -i" command will display incorrect SLAB
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statistics:
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crash> kmem -i | grep -e PAGES -e SLAB
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PAGES TOTAL PERCENTAGE
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SLAB 89458 349.4 MB 0% of TOTAL MEM
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^^^^^ ^^^^^
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With the patch, the actual result is:
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crash> kmem -i | grep -e PAGES -e SLAB
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PAGES TOTAL PERCENTAGE
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SLAB 261953 1023.3 MB 0% of TOTAL MEM
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Reported-by: Buland Kumar Singh <bsingh@redhat.com>
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Signed-off-by: Lianbo Jiang <lijiang@redhat.com>
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Signed-off-by: Kazuhito Hagio <k-hagio-ab@nec.com>
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---
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memory.c | 5 +++++
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1 file changed, 5 insertions(+)
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diff --git a/memory.c b/memory.c
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index d05737cc1429..625a94b7d7d4 100644
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--- a/memory.c
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+++ b/memory.c
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@@ -8388,6 +8388,11 @@ dump_kmeminfo(void)
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get_slabs = nr_slab;
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if (dump_vm_stat("NR_SLAB_UNRECLAIMABLE", &nr_slab, 0))
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get_slabs += nr_slab;
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+ } else if (dump_vm_stat("NR_SLAB_RECLAIMABLE_B", &nr_slab, 0)) {
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+ /* 5.9 and later */
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+ get_slabs = nr_slab;
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+ if (dump_vm_stat("NR_SLAB_UNRECLAIMABLE_B", &nr_slab, 0))
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+ get_slabs += nr_slab;
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}
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}
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--
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2.37.1
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