Messages in this thread | | | Date | Thu, 31 Mar 2022 16:48:11 +1100 | From | Dave Chinner <> | Subject | Re: [PATCH] xfs: getattr ignore blocks beyond eof |
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On Thu, Mar 31, 2022 at 04:33:40PM +1100, Dave Chinner wrote: > On Thu, Mar 31, 2022 at 11:28:59AM +0800, wang.yi59@zte.com.cn wrote: > > The above problems can be explained by fs preallocation. > > If the impact of preallocation are closed in fs, not visible to > > the outside, the result is stable and real for the application. ....
> If your application is dependent on block counts exactly matching > the file data space for waht ever reason, then what speculative > preallocation does is the least of your problems.
That said, if you have written an application that cannot handle this behaviour, then you can *turn it off* by using the allocsize mount option. But then subsequent file fragmentation issues are your own problem to solve, not ours.
Cheers,
Dave. -- Dave Chinner david@fromorbit.com
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