Messages in this thread | | | Date | Thu, 26 Mar 2009 18:59:00 +0000 | From | Alan Cox <> | Subject | Re: ext3 IO latency measurements (was: Linux 2.6.29) |
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> And what's the argument for not doing it in the kernel? > > The fact is, "atime" by default is just wrong.
It probably was a wrong default - twenty years ago. Actually it may well have been a wrong default in Unix v6 8)
However - atime behaviour is SuS required - there are users with systems out there using atime and dependant on proper atime
So we can't change the ABI on them any more than we can decide that next week write() should return short values on writes to disk interrupted by signals...
Letting distros flip to relatime means new installs and gradual migration occurs and nobody gets spectacularly blown up when their archiving system, their usage profiling and disk balancing tools and the like go wrong.
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