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SubjectRe: [PATCH 0/7] OMFS filesystem version 3
On Fri, Apr 18, 2008 at 1:35 PM, Szabolcs Szakacsits <szaka@ntfs-3g.org> wrote:
> The major reason seems to be that the FUSE version reads heavily from the
> block device during pure write operations, while the kernel driver never.
> There can be several non-exclusive explanations.

Yep, I suspect switching to the lower-level API plus switching to mmap()
and getting rid of various memcpy's in omfs.c would make a huge difference.
And also drop the line count without the hash table stuff.

> Moreover when you're writing to a block device from user space then the
> size and position of the block should be page aligned, otherwise you end up
> doing unwanted synchronous reads instead of the believed asynchronous
> writes.

Cool, thanks for the tips!

--
Bob Copeland %% www.bobcopeland.com


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