Messages in this thread | | | Date | Fri, 10 Mar 2006 11:19:40 -0500 | From | Dave Jones <> | Subject | Re: [RFC PATCH] ext3 writepage() journal avoidance |
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On Fri, Mar 10, 2006 at 09:43:57AM +0100, Arjan van de Ven wrote: > On Fri, 2006-03-10 at 00:23 -0800, Andrew Morton wrote: > > Arjan van de Ven <arjan@infradead.org> wrote: > > > > > > > > > > I'm not sure that PageMappedToDisk() gets set in all the right places > > > > though - it's mainly for the `nobh' handling and block_prepare_write() > > > > would need to be taught to set it. I guess that'd be a net win, even if > > > > only ext3 uses it.. > > > > > > btw is nobh mature enough yet to become the default, or to just go away > > > entirely as option ? > > > > I don't know how much usage it's had, sorry. It's only allowed in > > data=writeback mode and not many people seem to use even that. > > would you be prepared to turn it on by default in -mm for a bit to see > how it holds up? The concept seems valuable in itself, so much so that I > feel this should be 1) on always by default when possible and 2) isn't > really the kind of thing that should be a long term option; not having > it almost is a -o pleaseAddThisBug option for each bug fixed.
It'd be good to get that hammered on, as it doesn't see hardly any testing based upon the experiments I did sometime last year. It left me with an unmountable root filesystem :-/
Dave
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