Diffusion FreeBSD src repository af1c6d3f3013

amd64: do not leak pcpu pages
af1c6d3f3013
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Description

amd64: do not leak pcpu pages

Do not preallocate pcpu area backing pages on early startup, only
allocate enough of KVA for pcpu[MAXCPU] and the page for BSP. Other
pages are allocated after we know the number of cpus and their
assignments to the domains.

PCPUs are not accessed until they are initialized, which happens on AP
startup.

Reviewed by: markj
Sponsored by: The FreeBSD Foundation
Differential revision: https://reviews.freebsd.org/D39945

Details

Provenance

kib	Authored on May 3 2023, 9:41 AM

Reviewer

markj

Differential Revision

D39945: amd64: do not leak pcpu pages

Parents

rGe704f88f3d92: amd64: initialize APs kpmap_store in init_secondary()

Branches

Unknown

Tags

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Event Timeline

kib committed rGaf1c6d3f3013: amd64: do not leak pcpu pages (authored by kib).May 4 2023, 3:39 PM

kib added an edge: D39945: amd64: do not leak pcpu pages.

markj mentioned this in D42241: amd64: Zero-fill AP PCPU pages.Oct 16 2023, 10:51 PM

markj mentioned this in rGa37e484d0497: amd64: Zero-fill AP PCPU pages.Oct 17 2023, 1:38 PM

markj mentioned this in rG4533fa42ad91: amd64: Zero-fill AP PCPU pages.Oct 20 2023, 4:02 PM

markj mentioned this in rGe4d86dda3413: amd64: Zero-fill AP PCPU pages.Oct 22 2023, 3:06 PM

Changes (2)

Path

Size

sys/

amd64/

mp_machdep.c

pmap.c

rGaf1c6d3f3013

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sys/amd64/amd64/mp_machdep.c