Would it be possible to somehow keep the current buffer heads, but associate them with the inode such that readahead() on the directory would work? On Fri, 2010-05-07 at 20:46 -0400, tytso@xxxxxxx wrote: > Ext2 does use the page cache for directories. Ext3 and Ext4 access > directories via buffer heads because of the journaling requirement. > > In *theory* they could be modified to use the page cache, given that > we can do data journaling for files, and files live in the page cache > --- however, for cases where the PAGE_SIZE > FS_BLOCKSIZE, which will > happen if you are using 1k or 2k block filesystems, or on the Power > Architecture or on the Itanic where the page size is 16k, updates to > the directory will be much less efficient, since we journal changes to > data files on page granularity and not buffer granuality. > > Furthermore, someone would have to supply me with the patches; it's > pretty low on my priority list. And people on the Power and ia64 > platforms won't be happy.... > > - Ted -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
