On Sat, February 7, 2009 6:27 am, Igor Podlesny wrote: > 2009/2/7 NeilBrown <neilb@xxxxxxx>: >> On Sat, February 7, 2009 5:08 am, Igor Podlesny wrote: >>> Hi! >>> >>> $(Subj). :-) >>> >>> P. S. Also, I deem there lots of structures in kernel that could >>> benefit >>> from using HugePages. But this probably a q-n for another kernel list. >> >> I have only a vague idea what HugePages are and it is not at all clear >> to >> me why you would want to use them for the MD cache. I assume you are >> > HugePages requires less TBL entries so they better fit for large > buffers, as far as I understand. > > http://unixfoo.blogspot.com/2007/10/hugepages.html > http://linux-mm.org/HugePagesArticles > >> talking about MD/RAID456 as that is the only place we use a cache. >> > Yeah, "stripe_cache_size" setting. >> >> Maybe if you could explain what you are thinking.... >> > Yeah, hope this would suffice. Not really, no. md does not use "large buffers", Just lots of little buffers. NeilBrown -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
