On 2020-06-07 23:34, Chaitanya Kulkarni wrote: > Bart, > > On 6/4/20 9:31 PM, Bart Van Assche wrote: >> Where is the code that imposes these limits? I haven't found it. Did I >> perhaps overlook something? > > It is in blktrace.c user-space tool. > > 55 > 56 /* > 57 * You may want to increase this even more, if you are logging at > a high > 58 * rate and see skipped/missed events > 59 */ > 60 #define BUF_SIZE (512 * 1024) > 61 #define BUF_NR (4) > 62 > 63 #define FILE_VBUF_SIZE (128 * 1024) > 64 > 65 #define DEBUGFS_TYPE (0x64626720) > 66 #define TRACE_NET_PORT (8462) > 67 Hi Chaitanya, With my question I was referring to kernel code. I think Harshad understood that part of my question. Thanks, Bart.