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Date: Fri, 17 Nov 2023 01:40:56 +0000
Subject: [Bug 217965] ext4(?) regression since 6.5.0 on sata hdd

--- Comment #35 from Eyal Lebedinsky ( ---
$ sudo dnf debuginfo-install kernel
Installing dependencies:

$ sudo perf probe -a "ext4_mb_find_good_group_avg_frag_lists order"

$ sudo perf probe -a "ext4_mb_find_good_group_avg_frag_lists:18 cr

$ sudo perf record -e probe:ext4_mb_find_good_group_avg_frag_lists -e
probe:ext4_mb_find_good_group_avg_frag_lists_L18 -e
probe:ext4_mb_good_group_L20 -e ext4:ext4_mballoc_alloc -g -p 2789843 sleep 20

$ sudo perf script -i > perf-probe.log
[ perf record: Woken up 1395 times to write data ]
Processed 24640612 events and lost 22 chunks!

Check IO/CPU overload!

[ perf record: Captured and wrote 4725.791 MB (19187380 samples) ]

$ sudo perf script -i > perf-probe.log
Processed 24640612 events and lost 22 chunks!

Check IO/CPU overload!

$ ls -l perf-probe.log
-rw-r--r-- 1 eyal eyal 39024390135 Nov 17 12:31 perf-probe.log

I am limited to upload much less that this as an attachment.
        File size limit: 5120 KB)

I managed to include only so many likes ftom the head:

$ wc -l perf-probe-head.log
51594 perf-probe-head.log

See attachement

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