** Summary changed:
- crash (on ppc64) hen restarting numad while huge guest is active
+ crash (on ppc64) when restarting numad while huge guest is active
** Description changed:
- I found that "by accident" while verifying another fix for numad.
- It seems (at least on a power 9 box) that if you have a huge kvm guest
running and restart numad that it crashes.
+ while verifying bug 1832915 I found "by accident" that this crash (at
+ least on our power 9 box seems to happen often.
+
+ Case:
+ - huge kvm guest running
+ - restart numad
+ => Numad crashes.
The crash seems related to some re-init of a static structure:
stack trace ---
#0 tcache_get (tc_idx=<optimized out>) at malloc.c:2950
- e = 0x9a5ddc1950
- e = <optimized out>
- __PRETTY_FUNCTION__ = "tcache_get"
+ e = 0x9a5ddc1950
+ e = <optimized out>
+ __PRETTY_FUNCTION__ = "tcache_get"
#1 __GI___libc_malloc (bytes=16) at malloc.c:3058
- ar_ptr = <optimized out>
- victim = <optimized out>
- hook = <optimized out>
- tbytes = <optimized out>
- tc_idx = <optimized out>
- __PRETTY_FUNCTION__ = "__libc_malloc"
+ ar_ptr = <optimized out>
+ victim = <optimized out>
+ hook = <optimized out>
+ tbytes = <optimized out>
+ tc_idx = <optimized out>
+ __PRETTY_FUNCTION__ = "__libc_malloc"
#2 0x0000009a300279a0 in ?? ()
No symbol table info available.
#3 0x0000009a3002cad8 in ?? ()
No symbol table info available.
#4 0x0000009a30023794 in ?? ()
No symbol table info available.
#5 0x00007a6150998278 in generic_start_main (main=0x9a30022a00,
argc=<optimized out>, argv=0x7fffe93a7828, auxvec=0x7fffe93a7880,
init=<optimized out>, rtld_fini=<optimized out>, stack_end=<optimized out>,
fini=<optimized out>) at ../csu/libc-start.c:308
- self = 0x7a6150dc38d0
- result = <optimized out>
- unwind_buf = {cancel_jmp_buf = {{jmp_buf = {8465053667230565969,
134558384812288, 8465057470262718529, 0 <repeats 13 times>, 134558387008032, 0,
134558387008040, 662230455376, 0, 2449962883098869759, 0 <repeats 42 times>},
mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x7fffe93a7700, 0x0}, data =
{prev = 0x0, cleanup = 0x0, canceltype = -382044416}}}
- not_first_call = <optimized out>
+ self = 0x7a6150dc38d0
+ result = <optimized out>
+ unwind_buf = {cancel_jmp_buf = {{jmp_buf = {8465053667230565969,
134558384812288, 8465057470262718529, 0 <repeats 13 times>, 134558387008032, 0,
134558387008040, 662230455376, 0, 2449962883098869759, 0 <repeats 42 times>},
mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x7fffe93a7700, 0x0}, data =
{prev = 0x0, cleanup = 0x0, canceltype = -382044416}}}
+ not_first_call = <optimized out>
#6 0x00007a6150998484 in __libc_start_main (argc=<optimized out>,
argv=<optimized out>, ev=<optimized out>, auxvec=<optimized out>,
rtld_fini=<optimized out>, stinfo=<optimized out>, stack_on_entry=<optimized
out>) at ../sysdeps/unix/sysv/linux/powerpc/libc-start.c:116
No locals.
#7 0x0000000000000000 in ?? ()
No symbol table info available.
--- source code stack trace ---
#0 tcache_get (tc_idx=<optimized out>) at malloc.c:2950
- [Error: malloc.c was not found in source tree]
+ [Error: malloc.c was not found in source tree]
#1 __GI___libc_malloc (bytes=16) at malloc.c:3058
- [Error: malloc.c was not found in source tree]
+ [Error: malloc.c was not found in source tree]
#2 0x0000009a300279a0 in ?? ()
#3 0x0000009a3002cad8 in ?? ()
#4 0x0000009a30023794 in ?? ()
#5 0x00007a6150998278 in generic_start_main (main=0x9a30022a00,
argc=<optimized out>, argv=0x7fffe93a7828, auxvec=0x7fffe93a7880,
init=<optimized out>, rtld_fini=<optimized out>, stack_end=<optimized out>,
fini=<optimized out>) at ../csu/libc-start.c:308
- [Error: libc-start.c was not found in source tree]
+ [Error: libc-start.c was not found in source tree]
#6 0x00007a6150998484 in __libc_start_main (argc=<optimized out>,
argv=<optimized out>, ev=<optimized out>, auxvec=<optimized out>,
rtld_fini=<optimized out>, stinfo=<optimized out>, stack_on_entry=<optimized
out>) at ../sysdeps/unix/sysv/linux/powerpc/libc-start.c:116
- [Error: libc-start.c was not found in source tree]
+ [Error: libc-start.c was not found in source tree]
#7 0x0000000000000000 in ?? ()
I thought at first this would be related to my debug rebuilds, but it
seems to appear as-is.
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https://bugs.launchpad.net/bugs/1836913
Title:
crash (on ppc64) when restarting numad while huge guest is active
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