Messages in this thread | | | Date | Wed, 23 Jul 1997 23:32:51 -0400 | From | "Theodore Y. Ts'o" <> | Subject | Re: 2.0.30 serial.c, ppp.c and pppd-2.2 questions |
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Date: Thu, 24 Jul 1997 00:06:25 +0200 From: Andries.Brouwer@cwi.nl
Possibly entirely unrelated (you are talking about missed timer interrupts, probably I am talking about missed serial line interrupts) but my SLIP connection is completely unusable when something disk-intensive is running. FTP gets into an exponential backoff and seems to hang completely, but recovers some time after the make/find/whatever has finished.
[This happens both with IDE and SCSI activity. I never really investigated.]
At least for the IDE case, this is the very well known problem of the IDE driver disabling interrupts to prevent data corruption in a few badl;y designed IDE controllers. If you don't have the bad IDE controllers (see the man page for more details), you will likely be able to use "hdarm -u 1" which will fix the problem without causing your disks to get massively corruption.
As far as the SCSI activity, my guess it is a similar problem, but the solution to solve it is very dependent on the SCSI manufacturer.
- Ted
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