Re: [PATCH] remove 2TB block device limit

From: David Mosberger (davidm@napali.hpl.hp.com)
Date: Fri May 10 2002 - 19:07:26 EST


>>>>> On Fri, 10 May 2002 17:46:23 -0600, Andreas Dilger <adilger@clusterfs.com> said:

  Andreas> For 64-bit systems like Alpha, it is relatively easy to use
  Andreas> 8kB blocks for ext3. It has been discouraged because such
  Andreas> a filesystem is non-portable to other (smaller page-sized)
  Andreas> filesystems. Maybe this rationale should be re-examined -
  Andreas> I could probably whip up a configure option for e2fsprogs
  Andreas> to allow 8kB blocks in a few hours.

If you do this, please consider allowing a block size up to 64KB.
The ia64 kernel offers a choice of 4, 8, 16, and 64KB page size.

  Andreas> Does x86-64 and/or ia64 actually _use_ > 4kB page sizes?

ia64 linux normally uses > 4KB. The recommended page size at the
moment is 16KB. I didn't think 64KB would become realistic for quite
some time, but performance is surprisingly good, even on today's
systems.

        --david
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