Re: Definitions

[Jamie Lokier]

Andi Kleen wrote:
> In practice the memory pinning does not seem to be a problem with reiserfs.
> Reiserfs currently always uses a 32MB log which limits the pinned memory
> to 32MB per file system (all pinned buffers need to have log space
> reserved).

Ouch.  I need 32MB per file system?  That's more RAM than my 128MB
machine has...  and 32MB is way more RAM than the last 486 I used.

> In addition it only logs metadata and you have to do a lot of work to
> quickly dirty 32MB or more of metadata. It is rather unlikely in
> practice because you would need to deal with thousands of files to
> create that much dirty metadata.

find /  ->  100,000 dirty atime inodes.

Happens every night in a standard cron script.

-- Jamie