Re: POHMELFS high performance network filesystem. Transactions,failover, performance.

[Andrew Morton]

On Tue, 13 May 2008 21:45:24 +0400 Evgeniy Polyakov <johnpol@xxxxxxxxxxx> wrote:

> I'm please to announce POHMEL high performance network filesystem.

If any thread takes more than one kmap() at a time, it is deadlockable.
Because there is a finite pool of kmaps.  Everyone can end up holding
one or more kmaps, then waiting for someone else to release one.

Duplicating page_waitqueue() is bad.  Exporting it is probably bad too.
Better would be to help us work out why the core kernel infrastructure is
unsuitable, then make it suitable.
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