On 6/11/2012 8:29 AM, Carlos Maiolino wrote: > The maximum block size of a XFS filesystem is 64kiB. But in linux it's limited > to the PAGE_SIZE value. Correct. > so, on x86 architectures, the maximum block size is > 4kiB. Not entirely correct. Since ~1996, 16 years ago, PPro and higher 32bit CPUs with PSE/PSE36 support pages of 4MB, or 2MB with PAE enabled. x86-64 CPUs in long mode also support a 2MB page size. But the problem of internal fragmentation may outweigh the TLB and other benefits of these very large pages. I'm not an MM dev so I can't elaborate further. There may be other issues. > although it could benefit from a 16kiB page size, you'll need to be running an > operating system which supports this page size value. And AFAIK the kernel MM team doesn't have x86 2MB pages on their radar. Or do they? -- Stan _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
