On Tue, Feb 16, 2010 at 03:42:25PM -0500, Philipp Weis wrote:
> How could it end up in the page cache for this setup? There is no
> filesystem layer below the loop device. Any write that reaches the
> loop device is passed through to lvm, then md and finally the disk.
> Are you saying that there is extra caching going on at the lvm or md
> layers?

Yes, the block device node is a cached access mode, and uses the same
pagecache as a filesystem uses.




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