On Fri, Apr 18, 2008 at 1:35 PM, Szabolcs Szakacsits <szaka@xxxxxxxxxxx> 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 -- 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
