On 8/13/2013 11:04 AM, Mike Travis wrote: > > > On 8/13/2013 10:51 AM, Linus Torvalds wrote: >> by the time you can log in. And if it then takes another ten minutes >> until you have the full 16TB initialized, and some things might be a >> tad slower early on, does anybody really care? The machine will be up >> and running with plenty of memory, even if it may not be *all* the >> memory yet. > > Before the patches adding memory took ~45 mins for 16TB and almost 2 hours > for 32TB. Adding it late sped up early boot but late insertion was still > very slow, where the full 32TB was still not fully inserted after an hour. > Doing it in parallel along with the memory hotplug lock per node, we got > it down to the 10-15 minute range. >
FYI, the system at this time had 128 nodes each with 256GB of memory. About 252GB was inserted into the absent list from nodes 1 .. 126. Memory on nodes 0 and 128 was left fully present. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
