56 lines
2.5 KiB
Diff
56 lines
2.5 KiB
Diff
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Thomas Lamprecht <t.lamprecht@proxmox.com>
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Date: Wed, 10 Nov 2021 09:29:47 +0100
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Subject: [PATCH] arc stat/summary: guard access to l2arc MFU/MRU stats
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commit 085321621e79a75bea41c2b6511da6ebfbf2ba0a added printing MFU
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and MRU stats for 2.1 user space tools, but those keys are not
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available in the 2.0 module. That means it may break the arcstat and
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arc_summary tools after upgrade to 2.1 (user space), before a reboot
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to the new 2.1 ZFS kernel-module happened, due to python raising a
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KeyError on the dict access then.
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Move those two keys to a .get accessor with `0` as fallback, as it
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should be better to show some possible wrong data for new stat-keys
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than throwing an exception.
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Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
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---
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cmd/arc_summary/arc_summary3 | 4 ++--
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cmd/arcstat/arcstat.in | 4 ++--
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2 files changed, 4 insertions(+), 4 deletions(-)
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diff --git a/cmd/arc_summary/arc_summary3 b/cmd/arc_summary/arc_summary3
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index 7b28012ed..b0a31bbb7 100755
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--- a/cmd/arc_summary/arc_summary3
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+++ b/cmd/arc_summary/arc_summary3
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@@ -617,11 +617,11 @@ def section_arc(kstats_dict):
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prt_i1('L2 cached evictions:', f_bytes(arc_stats['evict_l2_cached']))
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prt_i1('L2 eligible evictions:', f_bytes(arc_stats['evict_l2_eligible']))
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prt_i2('L2 eligible MFU evictions:',
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- f_perc(arc_stats['evict_l2_eligible_mfu'],
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+ f_perc(arc_stats.get('evict_l2_eligible_mfu', 0), # 2.0 module compat
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arc_stats['evict_l2_eligible']),
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f_bytes(arc_stats['evict_l2_eligible_mfu']))
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prt_i2('L2 eligible MRU evictions:',
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- f_perc(arc_stats['evict_l2_eligible_mru'],
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+ f_perc(arc_stats.get('evict_l2_eligible_mru', 0), # 2.0 module compat
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arc_stats['evict_l2_eligible']),
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f_bytes(arc_stats['evict_l2_eligible_mru']))
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prt_i1('L2 ineligible evictions:',
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diff --git a/cmd/arcstat/arcstat.in b/cmd/arcstat/arcstat.in
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index cd9a803a2..6878419e7 100755
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--- a/cmd/arcstat/arcstat.in
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+++ b/cmd/arcstat/arcstat.in
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@@ -482,8 +482,8 @@ def calculate():
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v["el2skip"] = d["evict_l2_skip"] // sint
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v["el2cach"] = d["evict_l2_cached"] // sint
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v["el2el"] = d["evict_l2_eligible"] // sint
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- v["el2mfu"] = d["evict_l2_eligible_mfu"] // sint
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- v["el2mru"] = d["evict_l2_eligible_mru"] // sint
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+ v["el2mfu"] = d.get("evict_l2_eligible_mfu", 0) // sint
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+ v["el2mru"] = d.get("evict_l2_eligible_mru", 0) // sint
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v["el2inel"] = d["evict_l2_ineligible"] // sint
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v["mtxmis"] = d["mutex_miss"] // sint
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