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[$] Sharing memory for shared file extents
Tuesday May 24, 2022. 07:19 PM , from LWN.net
On the second day of the
2022 Linux Storage, Filesystem, Memory-management and BPF Summit (LSFMM), Goldwyn Rodrigues led a combined filesystem and memory-management session on saving memory when reading files that share extents. That kind of sharing can occur with copy-on-write (COW) filesystems, reflinks, snapshots, and other features of that sort. When reading those files, memory is wasted because multiple copies of the same data is stored in the page cache, so he wanted to explore adding a cache specifically to handle that.
https://lwn.net/Articles/895907/
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