Messages in this thread | | | Date | Mon, 04 Feb 2002 13:49:10 -0500 | From | Jeff Garzik <> | Subject | Re: O_DIRECT fails in some kernel and FS |
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Joel Becker wrote: > should know the caches might be inconsistent. Large O_DIRECT users, > such as databases, already know this. They are happily ignorant of > cache inconsistencies. All they care about is hardsectsize O_DIRECT > operations.
I have similar inclination, that is inspired from the implementation of "NTFS TNG": hard sector size should always equal sb->blocksize. This allows for fine-grained operations at the O_DIRECT level, logical block sizes > PAGE_CACHE_SIZE, easy implementation of fragments (>= hard sect size), O_DIRECT for fragments, and other stuff.
This works right now in 2.4 and 2.5 with no modification to the VFS core.
Jeff
-- Jeff Garzik | "I went through my candy like hot oatmeal Building 1024 | through an internally-buttered weasel." MandrakeSoft | - goats.com - 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/
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