Re: [Ext2-devel] [PATCH 1/5] Forking ext4 filesystem from ext3 filesystem

[Alex Tomas]

>>>>> Jeff Garzik (JG) writes:

 >> A buffer_head is the kernel's sole abstraction of a disk block. 
 >> Filesystems use disk blocks a lot, and they need such an abstraction.

 JG> IMO Al Viro work has shown that you can do pagecache I/O without needing 
 JG> such a heavyweight system.

in delayed allocation patch for ext3 (ontop of extents) we do use
bio's for data.

thanks, Alex
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