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| author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2018-08-09 13:04:41 +0200 |
|---|---|---|
| committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2018-09-21 10:29:37 +0200 |
| commit | e4a8065910cd6b2e7e0448cc6431ca2906322389 (patch) | |
| tree | 73492991cfa40f994c20d761d476e6bc16304536 /freebsd/sys/vm/uma_core.c | |
| parent | Update to FreeBSD head 2017-08-01 (diff) | |
| download | rtems-libbsd-e4a8065910cd6b2e7e0448cc6431ca2906322389.tar.bz2 | |
Update to FreeBSD head 2017-10-01
Git mirror commit b2f0376b45428f13151d229c5ae9d4d8f74acbd1.
Update #3472.
Diffstat (limited to 'freebsd/sys/vm/uma_core.c')
| -rw-r--r-- | freebsd/sys/vm/uma_core.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/freebsd/sys/vm/uma_core.c b/freebsd/sys/vm/uma_core.c index 011f6494..c40e682d 100644 --- a/freebsd/sys/vm/uma_core.c +++ b/freebsd/sys/vm/uma_core.c @@ -152,7 +152,7 @@ static LIST_HEAD(,uma_zone) uma_cachezones = LIST_HEAD_INITIALIZER(uma_cachezones); /* This RW lock protects the keg list */ -static struct rwlock_padalign uma_rwlock; +static struct rwlock_padalign __exclusive_cache_line uma_rwlock; #ifndef __rtems__ /* @@ -1367,10 +1367,6 @@ keg_large_init(uma_keg_t keg) keg->uk_ipers = 1; keg->uk_rsize = keg->uk_size; - /* We can't do OFFPAGE if we're internal, bail out here. */ - if (keg->uk_flags & UMA_ZFLAG_INTERNAL) - return; - /* Check whether we have enough space to not do OFFPAGE. */ if ((keg->uk_flags & UMA_ZONE_OFFPAGE) == 0) { shsize = sizeof(struct uma_slab); @@ -1378,8 +1374,17 @@ keg_large_init(uma_keg_t keg) shsize = (shsize & ~UMA_ALIGN_PTR) + (UMA_ALIGN_PTR + 1); - if ((PAGE_SIZE * keg->uk_ppera) - keg->uk_rsize < shsize) - keg->uk_flags |= UMA_ZONE_OFFPAGE; + if (PAGE_SIZE * keg->uk_ppera - keg->uk_rsize < shsize) { + /* + * We can't do OFFPAGE if we're internal, in which case + * we need an extra page per allocation to contain the + * slab header. + */ + if ((keg->uk_flags & UMA_ZFLAG_INTERNAL) == 0) + keg->uk_flags |= UMA_ZONE_OFFPAGE; + else + keg->uk_ppera++; + } } if ((keg->uk_flags & UMA_ZONE_OFFPAGE) && |