Messages in this thread | ![/](/images/icornerl.gif) | | From | Alan Cox <> | Subject | Re: SCSI Kernel Problem - BAD | Date | Tue, 12 Mar 1996 10:45:57 +0000 (GMT) |
| |
> problem is more severe when the I/O rate is high. not the amount of data > as much as the number of I/O operations per second. In a PC, these are > typically directly related to interrupts. I also noticed that a busy NFS > connection will aggravate it even more. and I just saw that when NFS was > busy on these partitions, I was loosing interrupts on the wd.c driver.
Heavy NFS load significantly increases the probability of GFP_ATOMIC or GFP_DMA memory allocations failing. There are also other things that will start to happen at this load (clustering attempts fail, the request queue is full, buffer cache grow/shrink). Is it worth trying these one at a time - eg a 4 item request queue and seeing if you can break it.
Alan
| ![\](/images/icornerr.gif) |