Re: Kernel hang with latest snapshot

[David Boreham <david_list at boreham dot org>]

Thanks v. much.

btw the compilation error I see is in the sync system call stp code :

 gcc -m32 -Wp,-MD,/tmp/stapGTgvfK/.stap_2801.o.d  -nostdinc -isystem 
/usr/lib/gcc/i386-redhat-linux/4.1.1/include -D__KERNEL__ -Iinclude  
-include include/linux/autoconf.h  -Wall -Wundef -Wstrict-prototypes 
-Wno-trigraphs -fno-strict-aliasing -fno-common -Wstrict-prototypes 
-Wundef -Werror-implicit-function-declaration -Os -fomit-frame-pointer 
-fasynchronous-unwind-tables -g -pipe -msoft-float -fno-builtin-sprintf 
-fno-builtin-log2 -fno-builtin-puts  -mpreferred-stack-boundary=2  
-march=i686 -mtune=generic -mtune=generic -mregparm=3 -ffreestanding 
-Iinclude/asm-i386/mach-default -Wdeclaration-after-statement 
-Wno-pointer-sign -freorder-blocks -Wno-unused -Werror 
-I"/usr/local/share/systemtap/runtime"   -DMODULE -D"KBUILD_STR(s)=#s" 
-D"KBUILD_BASENAME=KBUILD_STR(stap_2801)"  
-D"KBUILD_MODNAME=KBUILD_STR(stap_2801)" -c -o 
/tmp/stapGTgvfK/.tmp_stap_2801.o /tmp/stapGTgvfK/stap_2801.c
/tmp/stapGTgvfK/stap_2801.c: In function 'function_log_iosyscall_sync':
/tmp/stapGTgvfK/stap_2801.c:10126: error: 'GroupID' undeclared (first 
use in this function)
/tmp/stapGTgvfK/stap_2801.c:10126: error: (Each undeclared identifier is 
reported only once
/tmp/stapGTgvfK/stap_2801.c:10126: error: for each function it appears in.)
/tmp/stapGTgvfK/stap_2801.c:10126: error: 'hookID' undeclared (first use 
in this function)
make[1]: *** [/tmp/stapGTgvfK/stap_2801.o] Error 1


Which comes from here :

function log_iosyscall_sync(hookid:long)
%{
       struct timeval tv;
       do_gettimeofday(&tv);
#if defined(ASCII_TRACE)
       _stp_printf("%d%d%d%d%d%d%d%d", _GROUP_IOSYSCALL,
               THIS->hookid, tv.tv_sec, tv.tv_usec,
               current->tgid, current->parent->pid, current->pid,
               current->thread_info->cpu);

#else

       if(timing_method == TIMING_GETCYCLES) {
               _stp_printf("%2b%2n%8b%8b", (_FMT_)0,
                       (_FMT_)get_cycles(),
                       (_FMT_)((int64_t)current->pid << 32 |
                               (int32_t)GroupID << 24 | (int32_t)hookID 
<< 16 |
                               (int16_t)current->thread_info->cpu << 8));
       }
       else if(timing_method == TIMING_GETTIMEOFDAY) {
               struct timeval tv;
               do_gettimeofday (&tv);
               _stp_printf("%2b%2n%8b%8b", (_FMT_)0,
                       (_FMT_)(tv.tv_sec*1000000LL + tv.tv_usec),
                       (_FMT_)((int64_t)current->pid << 32 |
                               (int32_t)GroupID << 24 | (int32_t)hookID 
<< 16 |
                               (int16_t)current->thread_info->cpu << 8));
       }
       else {
               _stp_printf("%2b%2n%8b%8b", (_FMT_)0,
                       (_FMT_)pfn_schedclock(),
                       (_FMT_)((int64_t)current->pid << 32 |
                               (int32_t)GroupID << 24 | (int32_t)hookID 
<< 16 |
                               (int16_t)current->thread_info->cpu << 8));
       }
#endif

%}