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LWN.net comments

schism status [LWN.net] Does using per-CPU variables in preemptable code make sense? [LWN.net] One option for dirty frag via selinux, dependent on user cases where ipsec is needed [LWN.net] Better off keeping it vague [LWN.net] Cost of LLMs in the cloud [LWN.net] Cost of LLMs in the cloud [LWN.net] everyone wins here [LWN.net] Thoughts from a younger generation.. [LWN.net] a bit of fishes vs bicycles comparison [LWN.net] Better off keeping it vague [LWN.net] Better off keeping it vague [LWN.net] Thoughts from a younger generation.. [LWN.net] Thoughts from a younger generation.. [LWN.net] Better off keeping it vague [LWN.net] Better off keeping it vague [LWN.net] Better off keeping it vague [LWN.net] Some performance numbers? [LWN.net] workaround is okay [LWN.net] Better off keeping it vague [LWN.net] Thoughts from a younger generation.. [LWN.net] OpenWrt One still available for sale! [LWN.net] Does using per-CPU variables in preemptable code make sense? [LWN.net] Excellent communication [LWN.net] It's a shame [LWN.net] Fade out [LWN.net] Fade out [LWN.net] Which cards? [LWN.net] Which cards? [LWN.net] Better off keeping it vague [LWN.net] Hype isn't going anywhere at this rate [LWN.net] Per-CPU PGDs... [LWN.net] It's a shame [LWN.net] Thoughts from a younger generation.. [LWN.net] Thoughts from a younger generation.. [LWN.net] Thoughts from a younger generation.. [LWN.net] Thoughts from a younger generation.. [LWN.net] Thoughts from a younger generation.. [LWN.net] Thoughts from a younger generation.. [LWN.net] __set_flex_counter() and __flex_counter() [LWN.net] Thoughts from a younger generation.. [LWN.net] Thoughts from a younger generation.. [LWN.net] If you only want to work, why live? [LWN.net] Thoughts from a younger generation.. [LWN.net] If you only want to work, why live? [LWN.net] Thoughts from a younger generation.. [LWN.net] Thoughts from a younger generation.. [LWN.net] Thoughts from a younger generation.. [LWN.net] Thoughts from a younger generation.. [LWN.net] Thoughts from a younger generation.. [LWN.net] Thoughts from a younger generation.. [LWN.net] Thoughts from a younger generation.. [LWN.net] Thoughts from a younger generation.. [LWN.net] Thoughts from a younger generation.. [LWN.net] RISKS Archive [LWN.net] RISKS Archive [LWN.net] Origin of the quote. [LWN.net] Thoughts from a younger generation.. [LWN.net] Thoughts from a younger generation.. [LWN.net] Thoughts from a younger generation.. [LWN.net] RISKS Archive [LWN.net] "Reproducible" sounds like a yes/no question but it's not [LWN.net] Thoughts from a younger generation.. [LWN.net] Thoughts from a younger generation.. [LWN.net] Thoughts from a younger generation.. [LWN.net] Thoughts from a younger generation.. [LWN.net] Thoughts from a younger generation.. [LWN.net] Thoughts from a younger generation.. [LWN.net] Thoughts from a younger generation.. [LWN.net] Thoughts from a younger generation.. [LWN.net] Ownership [LWN.net] Thoughts from a younger generation.. [LWN.net] Thoughts from a younger generation.. [LWN.net] Thoughts from a younger generation.. [LWN.net] Now to test the tests [LWN.net] Thoughts from a younger generation.. [LWN.net] Thoughts from a younger generation.. [LWN.net] Another of the great old ones passes [LWN.net] Thoughts from a younger generation.. [LWN.net] Ownership [LWN.net] off-by-ten? [LWN.net] Thoughts from a younger generation.. [LWN.net] Status of recent 0-days? [LWN.net] off-by-ten? [LWN.net] Status of recent 0-days? [LWN.net] Mark authencesn as BROKEN? [LWN.net] Fragnesia [LWN.net] Great product [LWN.net] Fragnesia mitigations [LWN.net] Fragnesia [LWN.net] BPF mm stability [LWN.net] Fragnesia [LWN.net] Mitigation [LWN.net] People should be paying attention to the role of splice in these bugs. [LWN.net] What are we gaining with chat? [LWN.net] Mitigation [LWN.net] Mitigation [LWN.net] What are we gaining with chat? [LWN.net] Rationale for the pseudo-random threshold? [LWN.net] Is that not the LLM guy? [LWN.net] Dolt contains no MySQL code [LWN.net]
MADV_COLLAPSE support? [LWN.net]
2026-04-10 · via LWN.net comments

MADV_COLLAPSE support?

Posted Apr 10, 2026 14:33 UTC (Fri) by andresfreund (subscriber, #69562)
Parent article: Removing read-only transparent huge pages for the page cache
to post comments

MADV_COLLAPSE support?

Posted Apr 10, 2026 14:37 UTC (Fri) by corbet (editor, #1) [Link] (1 responses)

I don't have time to dig in to verify it now but ... the patch series itself essentially replaces CONFIG_READ_ONLY_THP_FOR_FS checks with "can the filesystem do PMD-size folios?" checks. So I am guessing that MADV_COLLAPSE should work as expected.

MADV_COLLAPSE support?

Posted Apr 10, 2026 15:07 UTC (Fri) by andresfreund (subscriber, #69562) [Link]

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