On Mon, Jul 18, 2022 at 7:44 PM Bagas Sanjaya <bagasdotme@xxxxxxxxx> wrote: > > On 7/19/22 02:46, Jim Cromie wrote: > > -You can view the currently configured behaviour of all the debug > > -statements via:: > > +You can view the currently configured behaviour in the *prdbg* catalog: > > > > - nullarbor:~ # cat <debugfs>/dynamic_debug/control > > + :#> head -n7 /proc/dynamic_debug/control > > # filename:lineno [module]function flags format > > - net/sunrpc/svc_rdma.c:323 [svcxprt_rdma]svc_rdma_cleanup =_ "SVCRDMA Module Removed, deregister RPC RDMA transport\012" > > - net/sunrpc/svc_rdma.c:341 [svcxprt_rdma]svc_rdma_init =_ "\011max_inline : %d\012" > > - net/sunrpc/svc_rdma.c:340 [svcxprt_rdma]svc_rdma_init =_ "\011sq_depth : %d\012" > > - net/sunrpc/svc_rdma.c:338 [svcxprt_rdma]svc_rdma_init =_ "\011max_requests : %d\012" > > - ... > > + init/main.c:1179 [main]initcall_blacklist =_ "blacklisting initcall %s\012 > > + init/main.c:1218 [main]initcall_blacklisted =_ "initcall %s blacklisted\012" > > + init/main.c:1424 [main]run_init_process =_ " with arguments:\012" > > + init/main.c:1426 [main]run_init_process =_ " %s\012" > > + init/main.c:1427 [main]run_init_process =_ " with environment:\012" > > + init/main.c:1429 [main]run_init_process =_ " %s\012" > > > > The block above is screen output, so keep using literal code block > marker (::). > yup. > What isn't described in the patch description is $PS1, which changed > to just root prompt (without username). > I lumped it under general de-cluttering. the alias makes the pwd irrelevant, so no point in showing it. I'll add a note to the commit-msg > > > +Kernel Configuration > > +==================== > > + > > +Dynamic Debug is enabled via kernel config items: > > + > > + CONFIG_DYNAMIC_DEBUG=y # build catalog, enables CORE > > + CONFIG_DYNAMIC_DEBUG_CORE=y # enable mechanics only, skip catalog > > + > > Also use literal code blockhere > > > +Fedora's distro-kernel has both, and has 7250 *prdbgs*. Each callsite > > +record uses 56 bytes, so the impact on memory is non-trivial. > > + > > +If you do not want to enable dynamic debug globally (i.e. in some embedded > > +system), you may set ``CONFIG_DYNAMIC_DEBUG_CORE`` as basic support of dynamic > > +debug and add ``ccflags := -DDYNAMIC_DEBUG_MODULE`` into the Makefile of any > > +modules which you'd like to dynamically debug later. > > + > > This assumes one has Fedora installed, so I think this should be > written as distro-agnostic. > I just used the specifics I knew. The point was size info tradeoffs for folks building their own kernels. I'll just drop it, the numbers are subject to change anyway. > Thanks. > > -- > An old man doll... just what I always wanted! - Clara
