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| author | mjg <mjg@FreeBSD.org> | 2017-03-14 20:43:04 +0000 |
|---|---|---|
| committer | mjg <mjg@FreeBSD.org> | 2017-03-14 20:43:04 +0000 |
| commit | 3edf8a9d08485cf11c17af11e7852d41f8edea23 (patch) | |
| tree | 3a52f54c3221a41c2827b86fcf9b8cfa4136dae9 /lib/libc | |
| parent | 57f28a25af7dd32fc8adea80c5ebb2b237cc86a6 (diff) | |
| download | FreeBSD-src-3edf8a9d08485cf11c17af11e7852d41f8edea23.zip FreeBSD-src-3edf8a9d08485cf11c17af11e7852d41f8edea23.tar.gz | |
MFC r312724,r312901,r312902:
hwpmc: partially depessimize munmap handling if the module is not loaded
HWPMC_HOOKS is enabled in GENERIC and triggers some work avoidable in the
common (module not loaded) case.
In particular this avoids permission checks + lock downgrade
singlethreaded and in cases were an executable mapping is found the pmc
sx lock is no longer bounced.
Note this is a band aid.
==
hwpmc: partially depessimize mmap handling if the module is not loaded
In particular this means the pmc sx lock is no longer taken when an
executable mapping succeeds.
==
hwpmc: annotate pmc_hook and pmc_intr as __read_mostly
Diffstat (limited to 'lib/libc')
0 files changed, 0 insertions, 0 deletions
