Diffusion FreeBSD src repository - subversion rS355764

Slightly optimize locking in vm_map_copy_swap_entry(). Anonymous objects
rS355764
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Description

Slightly optimize locking in vm_map_copy_swap_entry(). Anonymous objects
require the object lock to synchronize collapse. Other swap objects such
as tmpfs do not.

Reported by: mjg
Reviewed by: kib, markj
Differential Revision: https://reviews.freebsd.org/D22747

Details

Provenance

jeff	Authored on

Reviewer

kib

Differential Revision

D22747: In vm_map_copy_swap_object the object lock is not needed to protect charge/ucred because they are protected by the map lock.

Parents

rS355763: Handle pagein clustering in vm_page_grab_valid() so that it can be used by

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Event Timeline

jeff committed rS355764: Slightly optimize locking in vm_map_copy_swap_entry(). Anonymous objects.Dec 15 2019, 2:02 AM

jeff added an edge: D22747: In vm_map_copy_swap_object the object lock is not needed to protect charge/ucred because they are protected by the map lock..

Changes (1)

Path

Size

head/

sys/

vm/

vm_map.c

rS355764

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