Messages in this thread | | | Subject | Re: [RFC PATCH] ext3 writepage() journal avoidance | From | Badari Pulavarty <> | Date | Fri, 10 Mar 2006 09:00:56 -0800 |
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On Fri, 2006-03-10 at 11:51 -0500, Dave Jones wrote: > On Fri, Mar 10, 2006 at 08:40:47AM -0800, Badari Pulavarty wrote: > > > > > > 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 :-/ > > > > Yuck. You are talking about "nobh" option for writeback mode, correct ? > > Have any idea on what you were doing ? > > Actually, I think I may have neglected to make those mounts writeback. > In retrospect, it was silly, I basically forced nobh on for all mounts. > A few boots later my / reached its maximum mount count, and got a fsck, > which moved a bunch of useful things like /lib/ld-linux.so.2 to lost+found. > There was so much mess that it was easier to reinstall the box than > to pick through it. (Thankfully I tested it on a scratch box ;-)
Well, This makes me feel better. I am not going to take full responsibility for this. :)
You can't force NOBH on all mounts. It gets silently ignored (there is a message in dmesg) on anything other than "writeback" mode and pagesize == blocksize.
Something else is going wrong here.
Thanks, Badari
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