On Tue, 2001-11-13 at 10:58, D. Stimits wrote:
>
> Out of curiosity, is there any reasonable way to access both block cache
> and the filesystem, such that the combined information is an
> "atomically" correct state at all times? I'm wondering what would be
> required to create a merging version of dd to do the recombining, or
> else to be able to at least write the cache out in a way that makes
> later retrieval practical (where recombining could be done by a separate
> program even if dd stores cache and live disk separately).
>
> D. Stimits, stimits@xxxxxxxxxx
>
In the latest cvs kernels, the two use almost the same memory for
metadata. Having said that, the superblock and the log are written
using different techniques and will not show up in the block cache
in realtime, everything else will.
File data uses a different cache all together.
Steve
--
Steve Lord voice: +1-651-683-3511
Principal Engineer, Filesystem Software email: lord@xxxxxxx
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