Messages in this thread | | | Date | Fri, 31 Aug 2001 17:43:55 +0200 (CEST) | From | Martin Josefsson <> | Subject | Re: 2.4.9-ac1 RAID-5 resync causes PPP connection to be unusable |
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On Fri, 31 Aug 2001, Andreas Dilger wrote:
> On Aug 30, 2001 21:23 -0700, Kevin P. Fleming wrote: > > OK, I see that now... and it looks like the risks associated with setting > > the unmaskirq flags on my drives (none of the four drives have it set now) > > are too great to be worth playing with it. I'll just not use my PPP > > connection during these particularly heavy disk activity moments. Thanks for > > the quick response. > > There was a kernel patch (or possibly a user-space tool) which allowed > one to change the "priority" of IRQs and their handlers. This was back > in the 1.2 or 2.0 days, when _any_ disk or other interrupt activity might > be enough to cause problems for serial connections (especially if you > only had a 16450 UART (1 byte buffer) instead of a 16550 (16 byte buffer). > You could make your serial interrupt (handler) take priority over disk > interrupts. > > Maybe Ted Ts'o or other long-time Linux folks will know what was actually > called, and whether it is still applicable to modern hardware/kernel.
It was called irqtune, http://www.best.com/~cae/irqtune/ But I don't know if it still works with newer hardware/kernel
/Martin
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