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| author | Jeff Roberson <jeff@FreeBSD.org> | 2019-10-15 03:41:36 +0000 |
|---|---|---|
| committer | Jeff Roberson <jeff@FreeBSD.org> | 2019-10-15 03:41:36 +0000 |
| commit | 205be21d997d5becfaee5918386d4087b09f98a8 (patch) | |
| tree | 045cfd556e3e84abc62d4254bba751f51664ad19 /sys/kern/uipc_shm.c | |
| parent | 8da1c09853811f6ce71ec3814a6082e43b202c2d (diff) | |
| download | src-205be21d997d5becfaee5918386d4087b09f98a8.tar.gz src-205be21d997d5becfaee5918386d4087b09f98a8.zip | |
(3/6) Add a shared object busy synchronization mechanism that blocks new page
busy acquires while held.
This allows code that would need to acquire and release a very large number
of page busy locks to use the old mechanism where busy is only checked and
not held. This comes at the cost of false positives but never false
negatives which the single consumer, vm_fault_soft_fast(), handles.
Reviewed by: kib
Tested by: pho
Sponsored by: Netflix, Intel
Differential Revision: https://reviews.freebsd.org/D21592
Notes
Notes:
svn path=/head/; revision=353538
Diffstat (limited to 'sys/kern/uipc_shm.c')
0 files changed, 0 insertions, 0 deletions