RE: KPATCH] Reserve VM for root (was: Re: Looking for better VM)

[pavel-velo@bug.ucw.cz]

Hi!

   >I've also never said OOM killer should be disabled. In theory the
   >non-overcommitting systems deadlock, Linux survives. Ironically
   >usually it's just the opposite in practice. Any user can
   >deadlock/crash Linux [default install, no quotas] but not an
   >non-overcommitting system [root can clean up]. Here is an example code
   >"simulating" a leaking daemon that will "deadlock" Linux even with
   >your OOM killer patch [that is anyway *MUCH* better than the actually
   >non-existing one in 2.2.x kernels]:
   >
   >main() { while(1) if (fork()) malloc(1); }
   >
   >With the patch below I could ssh to the host and killall the offending
   >processes. To enable reserving VM space for root do 

what about main() { while(1) system("ftp localhost &"); }

This. or so,ething similar should allow you to kill your machine even with your
patch from normal user account

														Pavel

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