Add a lockless lookup mechanism that uses a SMR zone.
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Authored by jeff on Nov 28 2019, 1:17 AM.

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Reviewers: None

Summary

This uses the UMA SMR zone support from https://reviews.freebsd.org/D22586 to implement a lockless lookup.

It is not yet safe to access the returned page so this can only be used as a bool check. I am sharing this review for an example of a consumer.

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Buildable 27827
Build 26006: arc lint + arc unit

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jeff created this revision.Nov 28 2019, 1:17 AM

Harbormaster completed remote builds in B27827: Diff 64989.Nov 28 2019, 1:17 AM

jeff edited the summary of this revision. (Show Details)Nov 28 2019, 1:44 AM

jeff set the repository for this revision to rS FreeBSD src repository - subversion.

Herald added a subscriber: imp. · View Herald TranscriptNov 28 2019, 1:44 AM

imp added inline comments.Nov 28 2019, 1:54 AM

sys/vm/vm_page.c
598	Why 10?

jeff mentioned this in D22586: Implement safe memory reclamation in UMA..Nov 28 2019, 2:07 AM

jeff added inline comments.Nov 28 2019, 2:26 AM

sys/vm/vm_page.c
598	Two new zones mentioned in the comments.

jeff abandoned this revision.Feb 1 2020, 1:30 AM

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Path

Size

sys/

vm/

2 line(s)

1 line

6 line(s)

1 line

74 line(s)

Diff 64989

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sys/vm/vm_init.c

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sys/vm/vm_object.c

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sys/vm/vm_page.c

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sys/vm/vm_radix.h

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Add a lockless lookup mechanism that uses a SMR zone.AbandonedPublicActions

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Revision ContentsChangeset List

Diff 64989

sys/vm/vm_init.c

sys/vm/vm_object.c

sys/vm/vm_page.c

sys/vm/vm_radix.h

sys/vm/vm_radix.c

Add a lockless lookup mechanism that uses a SMR zone.
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