Takes an optional extra argument for the return address so that the
stack parser has a chance to use instruction-dependent interpretation
of the frame to find parent frames.
Implemented only on Alpha for now, which needs it. Other
architectures just ignore the extra argument.
PR port-alpha/57716
XXX pullup-10
XXX pullup-9
XXX pullup-8
Remove it in ddb/db_syncobj.h too.
New sys/wchan.h defines wchan_t so that users need not pull in
sys/syncobj.h to get it.
Sprinkle #include <sys/syncobj.h> in .c files where it is now needed.
- Allocate only one struct pipe not two (no need to be bidirectional here).
- Then use f_flag (FREAD/FWRITE) to figure out what to do in the fileops.
- Never wake the other side or acquire long-term (I/O) lock unless needed.
- Whenever possible, defer wakeups until after locks have been released.
- Do some things locklessly in pipe_ioctl() and pipe_poll().
Some notable results:
- -30% latency on a 486DX2/66 doing 1 byte ping-pong within a single process.
- 2.5x less lock contention during "make cleandir" of src on a 48 CPU machine.
- 1.5x bandwith with 1kB messages on the same 48 CPU machine (8kB: same b/w).
Bolivar cannot carry double. One of these commands should have been
"show mounts", cf. page/pages and a few others. While here fix the
function name to be db_show_all_mounts to conform to the pattern.
crash(8) is built with _KMEMUSER defined but DDB not defined except
for a few specific files or on MIPS.
Seems to me crash(8) should really be built with DDB defined in all
.c files but that leads to other fallout I'm not really inclined to
diagnose right now.
This can be included unconditionally, and db_active can then be
queried unconditionally; if DDB is not in the kernel, then db_active
is a constant zero. Reduces need for #include opt_ddb.h, #ifdef DDB.
db_command_loop - do not ignore the return value from setjmp used to
guard db_cmd_on_enter. We do not want to re-execute the enter command
if it fails. Note that "fails" includes e.g. aborting long output
from the enter command with "q" at the --db more-- prompt, which is
quite likely as the default enter command is "bt".
While here, don't even bother with the whole song and dance if the
enter command is not set.
Include this only inside autoconf itself, and a few files that abuse
autoconf in ways I can't confidently make easy fixes for.
XXX kernel ABI change requires bump -- no more use of struct device
internals allowed, previously done by some drivers
when looking up function names for stack traces (where the addresses are the
return addresses of function calls), if the address is the first instruction
in the function, assume that the function being called is marked "noreturn"
and that the function containing the call is actually the function immediately
before the address that we looked up. to find the correct function name,
do the lookup again with (address - 1) and then add one to the offset within
the function that we find.
log() takes a 'int level' first argument, that must be supplied.
add an inline wrapper that calls vlog() with LOG_INFO, and the
supplied va_list.
(not noticed because this macro is not used anywhere in src but
i have a use in some uncommited code, that now failed to compile.)
skrll