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[$] Rethinking multi-grain timestamps
Monday October 9, 2023. 04:50 PM , from LWN.net
One of the significant features added to the mainline kernel during the 6.6
merge window was multi-grain timestamps, which allow the kernel to selectively store file modification times with higher resolution without hurting performance. Unfortunately, this feature also caused some surprising regressions, and was quickly ushered back out of the kernel as a result. It is instructive to look at how this feature went wrong, and how the developers involved plan to move forward from here.
https://lwn.net/Articles/946394/
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