lkml.org 
[lkml]   [2006]   [Aug]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 1/5] Forking ext4 filesystem from ext3 filesystem
Andrew Morton wrote:
> On Thu, 10 Aug 2006 16:13:33 -0400
> Jeff Garzik <jeff@garzik.org> wrote:
>
>> The sooner we kill buffer heads and use submit_bio(), the better :)
>
> A buffer_head is a caching entity and a bio is an IO container. They're
> quite separate concepts.

Yeah, sorry, I meant direct pagecache I/O. I forgot that bio doesn't
handle caching.


> 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.

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

Jeff



-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2006-08-10 23:05    [W:0.054 / U:0.524 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site