History of Gathered Ideas

* Don't allow kernel_thread() inside a context

* virtual ptmx masters/pty limits?

* make vx_info reference less (just a task_info->ptr)

* dentry/dcache accounting

* barrier/limit(hard)/(max/min)-held per period/failcnt

* switch to/from xid=0 on timer_notify_task(), printk(), *softirq(),

: netpoll_rx(), netdev_run_todo(), neigh_timer_handler(),

: neigh_proxy_process(), rtnetlink_rcv(), ip_expire(), ipq_rcv_sk(),

: tcp_write_timeout(), tcp_*_timer(), tcp_set_keepalive(),

: qdisc_restart(), svc_*(), xprt_*(), pty_*(), get_tgid_list()

== Open VZ Resource Params ==

||{Tb=0,Tc=tight,Rc=rule,B} > Param || Description ||

|| barrier || A barrier over which resource allocations are failed gracefully. sbrk/mmap fails ||

|| limit || hard resource limit ||

|| held || consumed resources ||

|| maxheld || maximum amount of consumed resources through the last period ||

|| minheld || minimum amount of consumed resources through the last period ||

|| failcnt || count of failed charges ||

== Open VZ Resource Limits ==

||{Tb=0,Tc=tight,Rc=rule,B} > Limit || || Description ||

|| 0 || UB_KMEMSIZE || Unswappable kernel memory size including struct task, page directories, etc. ||

|| 1 || UB_LOCKEDPAGES || Mlock()ed pages ||

|| 2 || UB_PRIVVMPAGES || Total number of pages, counting potentially private pages as private and used. ||

|| 3 || UB_SHMPAGES || IPC SHM segment size ||

|| 4 || UB_ZSHMPAGES || Anonymous shared memory. ||

|| 5 || UB_NUMPROC || Number of processes. ||

|| 6 || UB_PHYSPAGES || All resident pages, for swapout guarantee. ||

|| 7 || UB_VMGUARPAGES || Guarantee for memory allocation, checked against PRIVVMPAGES. ||

|| 8 || UB_OOMGUARPAGES || Guarantees against OOM kill. Only limit is used, no accounting. ||

|| 9 || UB_NUMTCPSOCK || Number of TCP sockets. ||

|| 10 || UB_NUMFLOCK || Number of file locks. ||

|| 11 || UB_NUMPTY || Number of PTYs. ||

|| 12 || UB_NUMSIGINFO || Number of siginfos. ||

|| 13 || UB_TCPSNDBUF || Total size of tcp send buffers. ||

|| 14 || UB_TCPRCVBUF || Total size of tcp receive buffers. ||

|| 15 || UB_OTHERSOCKBUF || Total size of other socket send buffers (all buffers for PF_UNIX) ||

|| 16 || UB_DGRAMRCVBUF || Total size of other socket receive buffers. ||

|| 17 || UB_NUMOTHERSOCK || Number of other sockets. ||

|| 18 || UB_DCACHESIZE || Size of busy dentry/inode cache. ||

|| 19 || UB_NUMFILE || Number of open files. ||

||{Rc=rule,B} > Limit || ||

|| 24 || UB_RESOURCES || ||

|| +0 || UB_UNUSEDPRIVVM || ||

|| +1 || UB_TMPFSPAGES || ||

|| +2 || UB_SWAPPAGES || ||

|| +3 || UB_HELDPAGES || ||

(taken from 2.6.8-022stab032, which, according to SWsoft is GPL now)