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authorDennis Zhou <dennisz@fb.com>2017-06-19 19:28:32 -0400
committerTejun Heo <tj@kernel.org>2017-06-20 15:31:43 -0400
commitdf95e795a722892a9e0603ce4b9b62fab9f02967 (patch)
treef26b6c6c78874be2b866d516c42da69a67acc07c /mm/percpu-vm.c
parent30a5b5367ef9d5c9055414e12ec2f02d9de2e70f (diff)
downloadlinux-df95e795a722892a9e0603ce4b9b62fab9f02967.tar.bz2
percpu: add tracepoint support for percpu memory
Add support for tracepoints to the following events: chunk allocation, chunk free, area allocation, area free, and area allocation failure. This should let us replay percpu memory requests and evaluate corresponding decisions. Signed-off-by: Dennis Zhou <dennisz@fb.com> Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'mm/percpu-vm.c')
-rw-r--r--mm/percpu-vm.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/mm/percpu-vm.c b/mm/percpu-vm.c
index 5915a224da52..7ad9d94bf547 100644
--- a/mm/percpu-vm.c
+++ b/mm/percpu-vm.c
@@ -345,6 +345,7 @@ static struct pcpu_chunk *pcpu_create_chunk(void)
chunk->base_addr = vms[0]->addr - pcpu_group_offsets[0];
pcpu_stats_chunk_alloc();
+ trace_percpu_create_chunk(chunk->base_addr);
return chunk;
}
@@ -352,6 +353,7 @@ static struct pcpu_chunk *pcpu_create_chunk(void)
static void pcpu_destroy_chunk(struct pcpu_chunk *chunk)
{
pcpu_stats_chunk_dealloc();
+ trace_percpu_destroy_chunk(chunk->base_addr);
if (chunk && chunk->data)
pcpu_free_vm_areas(chunk->data, pcpu_nr_groups);