Messages in this thread | | | Subject | Re: Solved with MTRR was: ISSUE: very slow (factor 100) 4-way 16GByte server, with 2.4.2 | From | David Wragg <> | Date | 29 Mar 2001 15:50:09 +0000 |
| |
Robert Suetterlin <sutter@robert2.mpe-garching.mpg.de> writes: > 2. I was not allowed to do `base=0 size=0x400000000 > type=write-back`, because of the overlap with the memory range at > base=0x0fb000000.
/proc/mtrr does allow overlapping regions in some cases, but the conditions turned out to be stricter than I remembered. You have to create the enclosing range first, which makes the facility useless in this case (perhaps in all potentially useful cases).
> So what I do is only disable 3-7, and then > base=0x400000000 size=0x400000000.
Yes, that solution should be safe.
- 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/
| |