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Pick 676cdd66792ccb629a978837ea2a066d5db342cc from upstream:

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Disable runtime detection of lazy purging support on FreeBSD.

    The check doesn't seem to serve any purpose here, and this shaves
    off three syscalls on binary startup.

Discussed by:	jasone
MFC after:	2 weeks
Sponsored by:	DARPA, AFRL
This commit is contained in:
Edward Tomasz Napierala 2018-10-23 13:54:54 +00:00
parent 5d704fafcb
commit bff19560ee
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=339654
1 changed files with 6 additions and 0 deletions
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6
contrib/jemalloc/src/pages.c
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@ -588,6 +588,11 @@ pages_boot(void) {
init_thp_state();
#ifdef __FreeBSD__
/*
* FreeBSD doesn't need the check; madvise(2) is known to work.
*/
#else
/* Detect lazy purge runtime support. */
if (pages_can_purge_lazy) {
bool committed = false;
@ -601,6 +606,7 @@ pages_boot(void) {
}
os_pages_unmap(madv_free_page, PAGE);
}
#endif
return false;
}