Messages in this thread | | | Date | Thu, 3 Mar 2005 03:37:04 -0800 | From | Andrew Morton <> | Subject | Re: [patch -mm series] ia64 specific /dev/mem handlers |
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jes@trained-monkey.org (Jes Sorensen) wrote: > > This patch introduces ia64 specific read/write handlers for /dev/mem > access which is needed to avoid uncached pages to be accessed through > the cached kernel window which can lead to random corruption.
This patch causes hiccups on my ia32e box.
linux:/home/akpm# /usr/sbin/hwscan --isapnp zsh: 7528 segmentation fault /usr/sbin/hwscan --isapnp linux:/home/akpm# /usr/sbin/hwscan --pci zsh: 7529 segmentation fault /usr/sbin/hwscan --pci linux:/home/akpm# /usr/sbin/hwscan --block zsh: 7530 segmentation fault /usr/sbin/hwscan --block linux:/home/akpm# /usr/sbin/hwscan --floppy zsh: 7533 segmentation fault /usr/sbin/hwscan --floppy
strace ends with:
open("/proc/apm", O_RDONLY) = -1 ENOENT (No such file or directory) open("/dev/mem", O_RDONLY) = 3 lseek(3, 1024, SEEK_SET) = 1024 read(3, 0x50a080, 256) = -1 EFAULT (Bad address) close(3) = 0 --- SIGSEGV (Segmentation fault) @ 0 (0) --- +++ killed by SIGSEGV +++
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