if SLUB is configured, kmem -S will display per-cpu data. This patch will hide data of offline cpu.
The original output is like below: <cut> crash> kmem -S ... CPU 1 KMEM_CACHE_CPU: ffff88003fc97360 CPU 1 SLAB: SLAB MEMORY NODE TOTAL ALLOCATED FREE ffffea0000dc0d40 ffff880037035000 0 16 11 5 FREE / [ALLOCATED] [ffff880037035000] [ffff880037035100] ... [ffff88003c6e0f00] CPU 2 KMEM_CACHE_CPU: ffff88003fd17360 CPU 2 SLAB: (empty) CPU 2 PARTIAL: (empty) CPU 3 KMEM_CACHE_CPU: ffff88003fd97360 CPU 3 SLAB: SLAB MEMORY NODE TOTAL ALLOCATED FREE ffffea0000ed8f80 ffff88003b63e000 0 16 13 3 FREE / [ALLOCATED] [ffff88003b63e000] ... <cut> With data of offline cpu(cpu #2) hiden, the output is like below: <cut> crash> kmem -S ... CPU 1 KMEM_CACHE_CPU: ffff88003fc97360 CPU 1 SLAB: SLAB MEMORY NODE TOTAL ALLOCATED FREE ffffea0000dc0d40 ffff880037035000 0 16 11 5 FREE / [ALLOCATED] [ffff880037035000] [ffff880037035100] ... [ffff88003c6e0f00] CPU 2 <OFFLINE> CPU 3 KMEM_CACHE_CPU: ffff88003fd97360 CPU 3 SLAB: SLAB MEMORY NODE TOTAL ALLOCATED FREE ffffea0000ed8f80 ffff88003b63e000 0 16 13 3 FREE / [ALLOCATED] [ffff88003b63e000] ... <cut> Signed-off-by: Qiao Nuohan <[email protected]> --- memory.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/memory.c b/memory.c index 6b7289b..10fa273 100755 --- a/memory.c +++ b/memory.c @@ -17466,6 +17466,11 @@ do_kmem_cache_slub(struct meminfo *si) per_cpu = (ulong *)GETBUF(sizeof(ulong) * vt->numnodes); for (i = 0; i < kt->cpus; i++) { + if (hide_offline_cpu(i)) { + fprintf(fp, "CPU %d <OFFLINE>\n", i); + continue; + } + cpu_slab_ptr = ULONG(si->cache_buf + OFFSET(kmem_cache_cpu_slab)) + kt->__per_cpu_offset[i]; fprintf(fp, "CPU %d KMEM_CACHE_CPU:\n %lx\n", i, cpu_slab_ptr); -- 1.8.5.3 -- Crash-utility mailing list [email protected] https://www.redhat.com/mailman/listinfo/crash-utility
