[lkml]   [2001]   [Oct]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [announce] [patch] limiting IRQ load, irq-rewrite-2.4.11-B5

On Wed, 3 Oct 2001, Linus Torvalds wrote:

> Now test it again with the disk interrupt being shared with the
> network card.
> Doesn't happen? It sure does. [...]

yes, disk IRQs might be delayed in that case. Without this mechanizm there
is a lockup.

> Which is why I like the NAPI approach. If somebody overloads my
> network card, my USB camera doesn't stop working.

i agree that NAPI is a better approach. And IRQ overload does not happen
on cards that have hardware-based irq mitigation support already. (and i
should note that those cards will likely perform even faster with NAPI.)

> I don't disagree with your patch as a last resort when all else fails,
> but I _do_ disagree with it as a network load limiter.

okay - i removed those parts already (kpolld) in today's patch. (It
initially was an experiment to prove that this is the only problem we are
facing under such loads.)


To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-03-22 13:03    [W:0.059 / U:1.340 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site