OS is redhat5.5 ,nginx 1.0.0 ,libunwind-0.99...
The /var/log/message frequently appear the follow messages:
Jun 13 10:20:31 localhost kernel: nginx[14431]: segfault at 2a2 ip 00007fa6b3a05eb6 sp 00007fff337d87e0 error 4 in libunwind.so.7.0.0[7fa6b39fb000+f000]
Jun 13 16:01:09 localhost kernel: nginx[13794]: segfault at 2a2 ip 00007fa6b3a05eb6 sp 00007fff337d87a0 error 4 in libunwind.so.7.0.0[7fa6b39fb000+f000]
Jun 13 17:55:00 localhost kernel: nginx[13808]: segfault at 2a2 ip 00007fa6b3a05eb6 sp 00007fff337d86e0 error 4 in libunwind.so.7.0.0[7fa6b39fb000+f000]
Jun 14 01:13:48 localhost kernel: nginx[14592]: segfault at 2a2 ip 00007fa6b3a05eb6 sp 00007fff337d87a0 error 4 in libunwind.so.7.0.0[7fa6b39fb000+f000]
Jun 14 01:47:13 localhost kernel: nginx[13153]: segfault at 2a2 ip 00007fa6b3a05eb6 sp 00007fff337d87e0 error 4 in libunwind.so.7.0.0[7fa6b39fb000+f000]
Jun 14 09:09:28 localhost kernel: nginx[28921]: segfault at 8008 ip 00007fa6b3a05eb6 sp 00007fff337d8c60 error 4 in libunwind.so.7.0.0[7fa6b39fb000+f000]
Jun 14 15:47:33 localhost kernel: nginx[21295]: segfault at 2a2 ip 00007fde9e837eb6 sp 00007fffc48594a0 error 4 in libunwind.so.7.0.0[7fde9e82d000+f000]

Can you help me solve it?