Replace kprobe function "blk_account_io_completion" to "blk_account_io_done" for kernel version >= 5.8.0
The kernel function "blk_account_io_completion" is not available anymore as attach point of Kprobe as of kernel version 5.8.0. Therefore, after discussions, we decided to use function "blk_account_io_done" instead in every kprobe attachment to "blk_account_io_completion".
diff --git a/tools/biotop.py b/tools/biotop.py
index cad3759..d3a42ef 100755
--- a/tools/biotop.py
+++ b/tools/biotop.py
@@ -178,7 +178,7 @@
if BPF.get_kprobe_functions(b'blk_start_request'):
b.attach_kprobe(event="blk_start_request", fn_name="trace_req_start")
b.attach_kprobe(event="blk_mq_start_request", fn_name="trace_req_start")
-b.attach_kprobe(event="blk_account_io_completion",
+b.attach_kprobe(event="blk_account_io_done",
fn_name="trace_req_completion")
print('Tracing... Output every %d secs. Hit Ctrl-C to end' % interval)