[$] What became of getrandom() in the vDSO

Date:
Thu, 25 Jul 2024 16:19:25 +0000

Description:
In the previous episode of the vgetrandom() story, Jason Donenfeld had put together a version of
the getrandom() system call that ran in user space, significantly improving performance for
applications that need a lot of random data while retaining all of the guarantees provided by the system call. At that time, it seemed that a consensus had built around the implementation and that it was headed toward
the mainline in that form. A few milliseconds after that article was
posted, though, a Linus-Torvalds-shaped obstacle appeared in its path.
That obstacle has been overcome and this work has now been merged for the
6.11 kernel, but its form has changed somewhat.

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Link to news story:
https://lwn.net/Articles/983186/


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