Messages in this thread | | | Date | Sat, 14 Apr 2007 18:19:27 +0200 | From | Ingo Molnar <> | Subject | Re: [Announce] [patch] Modular Scheduler Core and Completely Fair Scheduler [CFS] |
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* Willy Tarreau <w@1wt.eu> wrote:
> On Sat, Apr 14, 2007 at 03:01:01PM +0200, Willy Tarreau wrote: > > > > Well, I'll stop heating the room for now as I get out of ideas about how > > to defeat it. > > Ah, I found something nasty. > If I start large batches of processes like this : > > $ for i in $(seq 1 1000); do ./scheddos2 4000 4000 & done > > the ramp up slows down after 700-800 processes, but something very > strange happens. If I'm under X, I can switch the focus to all xterms > (the WM is still alive) but all xterms are frozen. On the console, > after one moment I simply cannot switch to another VT anymore while I > can still start commands locally. But "chvt 2" simply blocks. SysRq-K > killed everything and restored full control. Dmesg shows lots of :
> SAK: killed process xxxx (scheddos2): process_session(p)==tty->session. > > I wonder if part of the problem would be too many processes bound to > the same tty :-/
hm, that's really weird. I've Cc:-ed the tty experts (Erik, Jiri, Alan), maybe this description rings a bell with them?
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