Re: Recent /bin/sh breakage

[Andreas Gustafsson <gson%gson.org@localhost>]

Martin Husemann wrote:
> uarea swap support got removed, maybe that makes this difference?

I don't see any uarea related commits during the time period in case.
This should be the full list of the commits between the last working
version and the first broken one:

  2009.10.29.17.10.32 christos src/sys/ufs/lfs/lfs.h,v 1.129
  2009.10.29.17.10.32 christos src/sys/ufs/lfs/lfs_vnops.c,v 1.222
  2009.10.29.17.16.40 christos src/tools/lex/Makefile,v 1.8
  2009.10.29.17.17.12 christos src/external/bsd/flex/dist/Attic/parse.c,v 1.3
  2009.10.29.17.17.12 christos src/external/bsd/flex/dist/Attic/parse.h,v 1.2
  2009.10.29.17.17.12 christos src/external/bsd/flex/dist/initparse.c,v 1.1
  2009.10.29.17.17.12 christos src/external/bsd/flex/dist/initparse.h,v 1.1
  2009.10.29.17.17.33 christos src/external/bsd/flex/bin/Makefile,v 1.5
  2009.10.29.18.20.11 eeh src/sys/ufs/lfs/lfs_vfsops.c,v 1.279
  2009.10.29.21.03.59 christos src/external/bsd/byacc/dist/defs.h,v 1.3
  2009.10.29.21.03.59 christos src/external/bsd/byacc/dist/output.c,v 1.3
  2009.10.29.21.03.59 christos src/external/bsd/byacc/dist/reader.c,v 1.3
  2009.10.29.21.03.59 christos src/external/bsd/byacc/dist/skeleton.c,v 1.5
  2009.10.29.21.11.57 christos src/external/bsd/byacc/dist/output.c,v 1.4
  2009.10.30.00.30.20 christos src/tools/lex/Makefile,v 1.9
  2009.10.30.00.53.29 christos src/sys/ufs/lfs/lfs_vnops.c,v 1.223
  2009.10.30.01.40.45 joerg src/usr.bin/m4/m4.1,v 1.21
  2009.10.30.01.53.02 christos src/external/bsd/byacc/dist/config_h.in,v 1.3
  2009.10.30.01.57.48 christos src/sys/dev/pci/pm2reg.h,v 1.3
  2009.10.30.10.57.40 njoly src/sys/compat/linux/arch/amd64/syscalls.master,v 
1.33
  2009.10.30.10.58.15 njoly 
src/sys/compat/linux/arch/amd64/linux_syscallargs.h,v 1.35
  2009.10.30.10.58.15 njoly src/sys/compat/linux/arch/amd64/linux_syscall.h,v 
1.35
  2009.10.30.10.58.15 njoly src/sys/compat/linux/arch/amd64/linux_syscalls.c,v 
1.35
  2009.10.30.10.58.15 njoly src/sys/compat/linux/arch/amd64/linux_sysent.c,v 
1.35
  2009.10.30.15.05.54 he src/sys/arch/sparc/sparc/pmap.c,v 1.336
  2009.10.30.15.09.24 uebayasi src/usr.bin/tn3270/tools/mkmake/mkmake.y,v 1.14

It appears that the sh process running out of swap is the one forked
by init to create the tmpfs /dev.

I tried the experiment of installing the 2009.10.30.15.09.24
version (with 64 M of memory to make installation succeed), booting
the installed system, adding the line "ps -glaxw" at the end of
/dev/MAKEDEV, and then running "sh MAKEDEV -MM init".  Sure enough,
the VSZ of the sh process is huge:

  # sh MAKEDEV -MM init
  Created tmpfs /dev (1490944 byte, 2880 inodes)
  UID PID PPID   CPU PRI NI   VSZ   RSS WCHAN   STAT TTY      TIME COMMAND
    0   0    0     0 125  0     0 16504 uvm     DKl  ?     0:00.68 [system]
    0   1    0  9105  83  0  3044   756 wait    Is   ?     0:00.12 init 
    0 146    1     0  85  0  4936  1152 kqueue  Ss   ?     0:00.08 
/usr/sbin/syslogd -s 
    0 324    1     0  85  0  3012   788 nanoslp Ss   ?     0:00.03 
/usr/sbin/cron 
    0 330    1  7152  84  0  3092   788 kqueue  Is   ?     0:00.02 
/usr/sbin/inetd -l 
    0 337    1  1117  85  0  5828  1680 wait    Is   tty00 0:00.20 login 
    0 344  337     0  85  0  3068   952 wait    S    tty00 0:00.15 -sh 
    0 471  344 13031  85  0 27644 23500 wait    S+   tty00 0:01.15 sh MAKEDEV 
-MM init 
    0 541  471 13031  42  0  3064   852 -       O+   tty00 0:00.01 ps -glaxw 
    0 348    1  1218  85  0  3024   820 ttyraw  Is+  ttyE1 0:00.01 
/usr/libexec/getty Pc ttyE1 
    0 339    1  1218  85  0  3024   828 ttyraw  Is+  ttyE2 0:00.02 
/usr/libexec/getty Pc ttyE2 
    0 346    1  1356  85  0  3024   828 ttyraw  Is+  ttyE3 0:00.01 
/usr/libexec/getty Pc ttyE3 

I suspect the lex/yacc changes...
-- 
Andreas Gustafsson, gson%gson.org@localhost