Messages in this thread | | | Date | Wed, 12 Mar 2003 19:36:47 -0500 | From | sridhar vaidyanathan <> | Subject | mmaping /dev/mem |
| |
I have a problem mmaping /dev/mem on some address in RAM. I am aware of caveats,but I am trying to mmap a region which I am sure is not in use by the kernel(some additional code does this and returns a physical address which is what I use for mmap). The mmap call itself succeeds and /proc/pid/maps also shows that region, but I am unable to see what I write in target memory.I also tried with the O_SYNC flag as I was wondering is caching had anything to do with the results that I was seeing.No effect. This however works with a mem= option and when the mmap region falls out of the mem= boundary. any clues? Please cc as I am not subscribed sridhar
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |