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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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7ab0e50ad0
After enabling CONFIG_TRACE_ENUM_MAP_FILE (which will soon be renamed to
CONFIG_TRACE_EVAL_MAP_FILE), I am able to examine the enums that have
been evaluated:
# cat /sys/kernel/debug/tracing/enum_map
(which will soon be renamed to eval_map)
And it showed some interesting results:
[..]
ZONE_MOVABLE 3 (oom)
ZONE_NORMAL 2 (oom)
ZONE_DMA32 1 (oom)
ZONE_DMA 0 (oom)
3 3 (oom)
2 2 (oom)
1 1 (oom)
COMPACT_PRIO_ASYNC 2 (oom)
COMPACT_PRIO_SYNC_LIGHT 1 (oom)
COMPACT_PRIO_SYNC_FULL 0 (oom)
[..]
ZONE_DMA 0 (vmscan)
3 3 (vmscan)
2 2 (vmscan)
1 1 (vmscan)
COMPACT_PRIO_ASYNC 2 (vmscan)
[..]
ZONE_DMA 0 (kmem)
3 3 (kmem)
2 2 (kmem)
1 1 (kmem)
COMPACT_PRIO_ASYNC 2 (kmem)
[..]
ZONE_DMA 0 (compaction)
3 3 (compaction)
2 2 (compaction)
1 1 (compaction)
COMPACT_PRIO_ASYNC 2 (compaction)
[..]
The name within the parenthesis are the trace systems that the enum/eval
maps are associated with. When there's a number evaluated to another
number, that tells me that the TRACE_DEFINE_ENUM() was used on a #define
and not an enum. As #defines get converted normally, they are not needed
to be evaluated.
Each of the above trace systems with the number to number evaluation
included the file include/trace/events/mmflags.h which has:
/* High-level compaction status feedback */
#define COMPACTION_FAILED 1
#define COMPACTION_WITHDRAWN 2
#define COMPACTION_PROGRESS 3
[..]
#define COMPACTION_FEEDBACK \
EM(COMPACTION_FAILED, "failed") \
EM(COMPACTION_WITHDRAWN, "withdrawn") \
EMe(COMPACTION_PROGRESS, "progress")
Which is still needed for the __print_symbolic() usage in the
trace_event. But it is not needed to be evaluated.
Removing the evaluation part removes the unnecessary evaluations of
numbers to numbers.
Link: http://lkml.kernel.org/r/20170615074944.7be9a647@gandalf.local.home
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: David Rientjes <rientjes@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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| .. | ||
| 9p.h | ||
| afs.h | ||
| alarmtimer.h | ||
| asoc.h | ||
| bcache.h | ||
| block.h | ||
| bpf.h | ||
| btrfs.h | ||
| cgroup.h | ||
| clk.h | ||
| cma.h | ||
| compaction.h | ||
| context_tracking.h | ||
| cpuhp.h | ||
| devlink.h | ||
| dma_fence.h | ||
| ext4.h | ||
| f2fs.h | ||
| fib6.h | ||
| fib.h | ||
| filelock.h | ||
| filemap.h | ||
| fs_dax.h | ||
| fsi_master_gpio.h | ||
| fsi.h | ||
| gpio.h | ||
| host1x.h | ||
| hswadsp.h | ||
| huge_memory.h | ||
| i2c.h | ||
| intel_ish.h | ||
| intel-sst.h | ||
| iommu.h | ||
| ipi.h | ||
| irq.h | ||
| jbd2.h | ||
| kmem.h | ||
| kvm.h | ||
| libata.h | ||
| lock.h | ||
| mce.h | ||
| mdio.h | ||
| migrate.h | ||
| mmc.h | ||
| mmflags.h | ||
| module.h | ||
| napi.h | ||
| net.h | ||
| nilfs2.h | ||
| nmi.h | ||
| oom.h | ||
| page_isolation.h | ||
| page_ref.h | ||
| pagemap.h | ||
| percpu.h | ||
| power_cpu_migrate.h | ||
| power.h | ||
| printk.h | ||
| random.h | ||
| rcu.h | ||
| regulator.h | ||
| rpm.h | ||
| rxrpc.h | ||
| sched.h | ||
| scsi.h | ||
| signal.h | ||
| skb.h | ||
| sock.h | ||
| spi.h | ||
| spmi.h | ||
| sunrpc.h | ||
| sunvnet.h | ||
| swiotlb.h | ||
| syscalls.h | ||
| target.h | ||
| task.h | ||
| thermal_power_allocator.h | ||
| thermal.h | ||
| thp.h | ||
| timer.h | ||
| tlb.h | ||
| udp.h | ||
| ufs.h | ||
| v4l2.h | ||
| vb2.h | ||
| vmscan.h | ||
| vsock_virtio_transport_common.h | ||
| wbt.h | ||
| workqueue.h | ||
| writeback.h | ||
| xdp.h | ||
| xen.h | ||