Subj : [$] Guard pages for file-backed memory
To   : All
From : LWN.net
Date : Mon Mar 03 2025 15:15:09

[$] Guard pages for file-backed memory

Date:
Mon, 03 Mar 2025 15:00:22 +0000

Description:
One of the many new features packed into the 6.13 kernel release was guard
pages, a hardening mechanism that makes it possible to inject zero-access
pages into a process's address space in an efficient way.  That feature
only supports anonymous (user-space data) pages, though.  To make guard
pages more widely useful, Lorenzo Stoakes has put together a patch
set enabling the feature for file-backed pages as well; in the process,
he examined and resolved a long list of potential problems that extending
the feature could encounter.  One potential problem was not on his list,
though.

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Link to news story:
https://lwn.net/Articles/1011366/


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