Messages in this thread | | | Date | Tue, 15 Mar 2022 17:28:03 +0000 | From | Matthew Wilcox <> | Subject | Re: [PATCH] zram: Add a huge_idle writeback mode |
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On Tue, Mar 15, 2022 at 10:22:21AM -0700, Brian Geffon wrote: > Today it's only possible to write back as a page, idle, or huge. > A user might want to writeback pages which are huge and idle first > as these idle pages do not require decompression and make a good > first pass for writeback.
We're moving towards having many different sizes of page in play, not just PMD and PTE sizes. Is this patch actually a good idea in a case where we have, eg, a 32kB anonymous page on a system with 4kB pages? How should zram handle this case? What's our cut-off for declaring a page to be "huge"?
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