Differential D20470

Use vm_page_unwire_noq() instead of vm_page_unwire(PQ_NONE).
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Authored by markj on May 30 2019, 4:36 PM.

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Reviewers

alc
kib
dougm

Commits

rS348785: Replace uses of vm_page_unwire(m, PQ_NONE) with vm_page_unwire_noq(m).

Summary

For managed pages, these two calls are not equivalent:
vm_page_unwire(PQ_NONE) will remove the page from its page queue, if
any, while vm_page_unwire_noq() leaves it alone. However, the existing
callers of vm_page_unwire(PQ_NONE) are applying it to fictitious or
unmanaged pages, so there should be no functional impact.

Diff Detail

Repository

rS FreeBSD src repository - subversion

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Event Timeline

markj created this revision.May 30 2019, 4:36 PM

Herald added subscribers: emaste, andrew. · View Herald TranscriptMay 30 2019, 4:36 PM

Harbormaster completed remote builds in B24602: Diff 58077.May 30 2019, 4:37 PM

markj added reviewers: alc, kib, dougm.May 30 2019, 4:37 PM

kib accepted this revision.May 30 2019, 5:27 PM

kib added inline comments.

sys/vm/vm_glue.c
233 ↗	(On Diff #58077)	Just a note that the page is managed. It is because it is freed immediately after, we can use vm_page_unwire_noq().

This revision is now accepted and ready to land.May 30 2019, 5:27 PM

markj added inline comments.Jun 7 2019, 6:12 PM

sys/vm/vm_glue.c
233 ↗	(On Diff #58077)	This call was added in D19247, so it will not be committed with the rest of this diff.

Closed by commit rS348785: Replace uses of vm_page_unwire(m, PQ_NONE) with vm_page_unwire_noq(m). (authored by markj). · Explain WhyJul 7 2019, 4:44 AM

This revision was automatically updated to reflect the committed changes.

Herald added a subscriber: imp. · View Herald TranscriptJul 7 2019, 4:44 AM

Revision Contents
Changeset List

Path

Size

head/

sys/

amd64/

amd64/

2 lines

arm/

arm/

2 lines

nvidia/

drm2/

2 lines

compat/

linuxkpi/

common/

src/

2 lines

dev/

drm2/

ttm/

ttm_page_alloc.c

2 lines

ti/

2 lines

xen/

gntdev/

2 lines

i386/

i386/

2 lines

mips/

mips/

2 lines

riscv/

riscv/

2 lines

vm/

8 lines

2 lines

2 lines

Diff 59490

head/sys/amd64/amd64/pmap.c

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head/sys/arm/arm/pmap-v6.c

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head/sys/arm/nvidia/drm2/tegra_bo.c

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head/sys/compat/linuxkpi/common/src/linux_page.c

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head/sys/dev/drm2/ttm/ttm_page_alloc.c

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head/sys/dev/ti/if_ti.c

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head/sys/dev/xen/gntdev/gntdev.c

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head/sys/i386/i386/pmap.c

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head/sys/mips/mips/pmap.c

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head/sys/riscv/riscv/pmap.c

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head/sys/vm/uma_core.c

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head/sys/vm/vm_glue.c

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head/sys/vm/vm_kern.c

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