Re: Special Kernel Modification

From: Jeff Dike (jdike@karaya.com)
Date: Mon Nov 05 2001 - 15:18:42 EST


andrea@suse.de said:
> O_DIRECT is synchronous but only in terms of data, if you want the
> metadata to be synchronous as well you need to open with
> O_SYNC|O_DIRECT, and even in such case all the metadata reads will
> came from cache.

That's OK. The goal is to cram as many UMLs onto a host as possible by
eliminating caching as much as possible. If the metadata/data ratio is
small, then the metadata caching probably won't be noticable.

                                Jeff

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