/sys/kernel/debug/kmemleak empty despite kmemleak reports

[Paul Menzel]

Dear Linux folks,


Despite Linux 5.8-rc4 reporting memory leaks on the IBM POWER 8 S822LC, 
the file does not contain more information.

> $ dmesg
> […] > [48662.953323] perf: interrupt took too long (2570 > 2500), lowering 
kernel.perf_event_max_sample_rate to 77750
> [48854.810636] perf: interrupt took too long (3216 > 3212), lowering kernel.perf_event_max_sample_rate to 62000
> [52300.044518] perf: interrupt took too long (4244 > 4020), lowering kernel.perf_event_max_sample_rate to 47000
> [52751.373083] perf: interrupt took too long (5373 > 5305), lowering kernel.perf_event_max_sample_rate to 37000
> [53354.000363] perf: interrupt took too long (6793 > 6716), lowering kernel.perf_event_max_sample_rate to 29250
> [53850.215606] perf: interrupt took too long (8672 > 8491), lowering kernel.perf_event_max_sample_rate to 23000
> [57542.266099] perf: interrupt took too long (10940 > 10840), lowering kernel.perf_event_max_sample_rate to 18250
> [57559.645404] perf: interrupt took too long (13714 > 13675), lowering kernel.perf_event_max_sample_rate to 14500
> [61608.697728] Can't find PMC that caused IRQ
> [71774.463111] kmemleak: 12 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
> [92372.044785] process '@/usr/bin/gnatmake-5' started with executable stack
> [92849.380672] FS-Cache: Loaded
> [92849.417269] FS-Cache: Netfs 'nfs' registered for caching
> [92849.595974] NFS: Registering the id_resolver key type
> [92849.596000] Key type id_resolver registered
> [92849.596000] Key type id_legacy registered
> [101808.079143] kmemleak: 1 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
> [106904.323471] Can't find PMC that caused IRQ
> [129416.391456] kmemleak: 1 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
> [158171.604221] kmemleak: 34 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
> $ sudo cat /sys/kernel/debug/kmemleak
> $


Kind regards,

Paul