On Mon, Mar 04, 2013 at 01:44:30PM +0000, Poul-Henning Kamp wrote: > Content-Type: text/plain; charset=ISO-8859-1 > -------- > In message <[email protected]>, Don Lewis writes: > > >Prior to 231160, the syncer thread would call sync_vnode() for the > >syncer vnode of each mountpoint every 30 seconds [...] > > I agree that the lemming syncer is better, but the fundamental mistake of > only having one syncer thread is probably the root-cause in this case: > One camera-grade flash syncing may take (a lot) more than 30 seconds. > > One mountpoint having trouble (of whatever kind) should not affect > the rest of the mountpoints. > > I'm not sure if the syncer is untangled enough that we can have > per mount-point threads yet, but as soon as we can, we should do that.
The problem with "wdrain" is not due to any algorithm in the syncer. I explained it in some details in other mail.
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