On Thu, Oct 14, 2010 at 05:00:16PM -0400, Steven Rostedt wrote: > From: Steven Rostedt <srostedt@xxxxxxxxxx> > > This patch adds the support for the C version of recordmcount and > compile times show ~ 12% improvement. > > After verifying this works, other archs can add: > > HAVE_C_MCOUNT_RECORD > > in its Kconfig and it will use the C version of recordmcount > instead of the perl version. > While I haven't had the chance to debug this yet, turning it on for SH blows up immediately: ftrace: allocating 15200 entries in 30 pages ------------[ cut here ]------------ WARNING: at /home/pmundt/devel/git/sh-2.6/kernel/trace/ftrace.c:1007 Modules linked in: Pid : 0, Comm: swapper CPU : 0 Not tainted (2.6.36-05622-g38ab134-dirty #508) PC is at ftrace_bug+0x78/0x23c PR is at ftrace_bug+0x74/0x23c PC : 80064df4 SP : 8056ff70 SR : 400080f0 TEA : c0000004 R0 : 00000001 R1 : 00000001 R2 : 8064d862 R3 : 8056ff64 R4 : 805b47b4 R5 : 00000001 R6 : 00000000 R7 : 00000001 R8 : 803b15d8 R9 : 00000001 R10 : 9fc38be8 R11 : 00000000 R12 : 8064e88c R13 : 8064e880 R14 : 8056ff70 MACH: 00000000 MACL: 003d0900 GBR : 296e1678 PR : 80064df0 Call trace: [<80066a86>] ftrace_process_locs+0x15a/0x284 [<803b15d8>] dns_query+0x0/0x26c [<805f6a1a>] ftrace_init+0x112/0x1a8 [<801deec0>] strlen+0x0/0x58 [<8008f098>] get_zeroed_page+0x0/0x34 [<805f0918>] start_kernel+0x3e0/0x480 [<801deec0>] strlen+0x0/0x58 [<801eb388>] debug_smp_processor_id+0x0/0xe4 [<80002132>] _stext+0x132/0x140 Code: 80064dee: mov r9, r5 80064df0: tst r9, r9 80064df2: bt 80064df6 ->80064df4: trapa #62 80064df6: bra 80064ef2 80064df8: mov r9, r5 80064dfa: mov.l 80064f68 <ftrace_bug+0x1ec/0x23c>, r1 ! 8064d862 <__warned.27604+0x0/0x1> 80064dfc: mov.b r2, @r1 80064dfe: mov.l 80064f48 <ftrace_bug+0x1cc/0x23c>, r1 ! 8057021c <ftrace_disabled+0x0/0x4> ---[ end trace 4eaa2a86a8e2da22 ]--- ftrace failed to modify [<803b15d8>] dns_query+0x0/0x26c actual: 02:d1:22:4f Testing tracer nop: PASSED Suggestions? -- To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
