Messages in this thread | | | Subject | Re: ftrace syscalls, PowerPC: Fixes and PowerPC raw syscall tracepoint implementation | From | Benjamin Herrenschmidt <> | Date | Fri, 14 May 2010 09:55:18 +1000 |
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On Thu, 2010-05-13 at 12:06 -0400, Steven Rostedt wrote: > Frederic, > > I'm fine with these patches, but since you mainly did the syscall work, > I'll let you take them. > > The patches that touch the PowerPC code needs an acked-by from Ben or > Paul.
Done :-)
Cheers, Ben.
> -- Steve > > > On Thu, 2010-05-13 at 17:43 +1000, Ian Munsie wrote: > > This patch series implements raw system call tracepoints on PowerPC that can be > > used with ftrace and perf. Some problems with the generic ftrace syscall > > tracepoint code have also been addressed. > > > > The patches are based upon Ben's powerpc/next tree merged with tip/tracing/core > > > > Patch #1 removes all ftrace syscall events that fail to map the system call > > name from the system call metadata with the system call's number, preventing > > the events which will not work from showing up in perf list and removing them > > from /sys/kernel/debug/tracing/events/syscalls. > > > > Patches #2 and #3 allow for archs with unusual system call tables (#2) or > > unusual symbol names (#3) to override the appropriate functions so that they > > can still work with ftrace syscalls. > > > > Patch #4 implements the actual raw system call tracepoints that ftrace syscalls > > builds upon, allowing all of the system calls to be used with the raw_syscalls > > events category and most to be used with the syscalls category. > > > > > > Not all the raw_syscalls are currently mapped to ftrace syscalls - the syscalls > > defined in /arch/powerpc/include/asm/syscalls.h do not use the SYSCALL_DEFINE > > class of macros and as such have no meta data, likewise some of the ppc_* > > syscalls have assembly wrappers. These are on their way, but I wanted to put > > the work I have done so far out first. > > > > Some of those syscalls have different return types than the __SYSCALL_DEFINE > > macro uses (unsigned long, int, time_t) and some have different prefixes (ppc, > > ppc64) - I didn't particularly want to change them straight over without asking > > the list first, and I certainly don't want to change the return types. I see > > that Jason Baron ran into similar issues, but his "add compat syscall support" > > patches have yet to be merged, and do not tackle the differing return types. > > >
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