On Thu, Jun 25, 2009 at 04:37:43PM -0400, Theodore Tso wrote: > Nicely spotted. Yeah, that's a bug; we need to do something about > that one, too. And what we're doing is a bit silly; it may make sense > to use __get_free_pages if filesystem blocksize == PAGE_SIZE, but > otherwise we should be using a sub-page allocator. Right now, we're > chewing up a 16k PPC page for every 4k filesystem metadata page > allocated in journal_write_metadata_buffer(), and on x86, for the > (admittedly uncommon) 1k block filesystem, we'd be chewing up a 4k > page for a 1k block buffer. > > > Both of these problems exist for both ext3 and ext4. And ocfs2. Joel -- Life's Little Instruction Book #337 "Reread your favorite book." Joel Becker Principal Software Developer Oracle E-mail: joel.becker@xxxxxxxxxx Phone: (650) 506-8127 -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
