Diffusion FreeBSD src repository 1d5ebad06c20

pmap: optimize MADV_WILLNEED on existing superpages
1d5ebad06c20
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Description

pmap: optimize MADV_WILLNEED on existing superpages

Specifically, avoid pointless calls to pmap_enter_quick_locked() when
madvise(MADV_WILLNEED) is applied to an existing superpage mapping.

Reported by: mhorne
Reviewed by: kib, markj
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D36801

Details

Provenance

alc	Authored on Sep 30 2022, 6:54 AM

Reviewer

Differential Revision

D36801: Micro-optimize the application of MADV_WILLNEED to existing superpage mappings

Parents

rG8707cb19e681: if_vxlan(4): Check the size of data available in mbuf before using them

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Event Timeline

alc committed rG1d5ebad06c20: pmap: optimize MADV_WILLNEED on existing superpages (authored by alc).Sep 30 2022, 5:14 PM

alc added an edge: D36801: Micro-optimize the application of MADV_WILLNEED to existing superpage mappings.

mhorne mentioned this in D36563: riscv: handle existing mapping in pmap_enter_l2().Oct 4 2022, 3:42 PM

mhorne mentioned this in rG95b1c2706977: riscv: optimize MADV_WILLNEED on existing superpages.Oct 6 2022, 10:06 PM

mhorne mentioned this in rGb05b1ecbef00: amd64, arm64 pmap: fix a comment typo.

mhorne mentioned this in rG3562dcf3290a: riscv: optimize MADV_WILLNEED on existing superpages.Oct 13 2022, 2:10 PM

Changes (2)

Path

Size

sys/

amd64/

amd64/

arm64/

arm64/

rG1d5ebad06c20

sys/amd64/amd64/pmap.c

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sys/arm64/arm64/pmap.c

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