Messages in this thread | | | Date | Fri, 1 Nov 2002 23:29:48 +0000 | From | Dave Jones <> | Subject | Re: Kernel Panic during memcpy_toio to PCI card |
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On Fri, Nov 01, 2002 at 03:28:10PM -0800, Matt D. Robinson wrote:
>It still caused the crash in the same manner and at the same location. >Could someone help me with pointers to where I should start looking ? >Disabling interrupts around the memcpy_toio() did not make any >difference. Is this a hardware problem with the PCI card ? We are using >a Xilinx core with out FPGA build into it.
memcpy_toio() in 2.4 is still using memcpy() which could use prefetch() if you compile for certain processors. Prefetching io space could do all sorts of nasties.
2.5 changed this define (in include/asm-i386/io.h) to use __memcpy instead, which doesn't use prefetching.
Dave
Dave
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