On Mon, Jan 31, 2011 at 06:38:56PM +0100, Petar Hitij wrote: > Hello everybody, > I have the following problem: > 1. host system: Debian squeeze > uname -na > Linux vitez0 2.6.32-5-vserver-amd64 #1 SMP Wed Jan 12 > 05:05:13 UTC 2011 x86_64 GNU/Linux > 2. guest system was rsync-ed from old server, it contains > RedHat 9 32bit instance is it configured as 32bit guest? i.e. is the personality set correctly? > 3. guest starts ok (mysql, apache, postfix...), ps command > (and top) segfaults when it looks into /proc/meminfo. segfaults are usually (not always) a problem in the userspace code, where a point is dereferenced which points into forbidden space ... > I have tried to limit memory - cflags VIRTMEM - rlimits/rss > 200000, it didn't help. I cannot list processes in a vserver. > Best regards > Petar Hitij > guest > ============ > open("/proc/meminfo", O_RDONLY) = 5 > lseek(5, 0, SEEK_SET) = 0 > read(5, "MemTotal: 800000 kB\nMemF"..., 1023) = 1023 > --- SIGSEGV (Segmentation fault) @ 0 (0) --- > +++ killed by SIGSEGV +++ that looks like a bug in ps/top but of course, it could be a bunch of other things as well, try to install a debug version (or build it from source with debug info) and examine with gdb ... > [root@nfp-si /]# cat /etc/redhat-release > Red Hat Linux release 9 (Shrike) > [root@nfp-si /]# ls > bin boot dev etc home initrd lib lost+found misc mnt opt > poweroff proc root sbin suitespot tmp usr var > [root@nfp-si /]# cd /proc > [root@nfp-si proc]# df > Filesystem 1K-blocks Used Available Use% Mounted on > /dev/hdv1 58831036 44385408 11457188 80% / > [root@nfp-si proc]# mount > /dev/hdv1 on / type ufs (defaults) > none on /proc type proc (defaults) > none on /dev/pts type devpts (gid=5,mode=620) > [root@nfp-si proc]# cat /proc/meminfo > MemTotal: 800000 kB > MemFree: 156044 kB > Buffers: 451044 kB > Cached: 0 kB > SwapCached: 0 kB > Active: 1062608 kB > Inactive: 14134812 kB > Active(anon): 199536 kB > Inactive(anon): 9772 kB > Active(file): 863072 kB > Inactive(file): 14125040 kB > Unevictable: 0 kB > Mlocked: 0 kB > SwapTotal: 0 kB > SwapFree: 0 kB > Dirty: 4 kB > Writeback: 0 kB > AnonPages: 208188 kB > Mapped: 19864 kB > Shmem: 1200 kB > Slab: 666744 kB > SReclaimable: 637332 kB > SUnreclaim: 29412 kB > KernelStack: 2896 kB > PageTables: 4652 kB > NFS_Unstable: 0 kB > Bounce: 0 kB > WritebackTmp: 0 kB > CommitLimit: 13111820 kB > Committed_AS: 798836 kB > VmallocTotal: 34359738367 kB > VmallocUsed: 111536 kB > VmallocChunk: 34350727048 kB > HardwareCorrupted: 0 kB > HugePages_Total: 0 > HugePages_Free: 0 > HugePages_Rsvd: 0 > HugePages_Surp: 0 > Hugepagesize: 2048 kB > DirectMap4k: 6384 kB > DirectMap2M: 2080768 kB > DirectMap1G: 14680064 kB looks fine to me, although the values might be too large for a 32bit system ... > Host > =============== > > vitez0:~# vserver-info > Versions: > Kernel: 2.6.32-5-vserver-amd64 > VS-API: 0x00020305 > util-vserver: 0.30.215; Jun 18 2010, 13:35:17 this should be definitely updated, as it is not able to create safe guests (i.e. the isolation will be incomplete and it should be trivial to hurt the host and/or escape the guest) HTH, Herbert > Features: > CC: gcc, gcc (Debian 4.4.4-5) 4.4.4 > CXX: g++, g++ (Debian 4.4.4-5) 4.4.4 > CPPFLAGS: '' > CFLAGS: '-Wall -g -O2 -std=c99 -Wall -pedantic -W > -funit-at-a-time' > CXXFLAGS: '-g -O2 -ansi -Wall -pedantic -W > -fmessage-length=0 -funit-at-a-time' > build/host: x86_64-pc-linux-gnu/x86_64-pc-linux-gnu > Use dietlibc: yes > Build C++ programs: yes > Build C99 programs: yes > Available APIs: v13,net,v21,v22,v23,netv2 > ext2fs Source: e2fsprogs > syscall(2) invocation: alternative > vserver(2) syscall#: 236/glibc > crypto api: nss > python bindings: no > use library versioning: yes > > Paths: > prefix: /usr > sysconf-Directory: /etc > cfg-Directory: /etc/vservers > initrd-Directory: $(sysconfdir)/init.d > pkgstate-Directory: /var/run/vservers > vserver-Rootdir: /var/lib/vservers > > > Assumed 'SYSINFO' as no other option given; try '--help' for more information.