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amd64 pmap: conditionalize per-superpage locks on NUMA

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Instead of superpages use. The current code employs superpage-wide locking
regardless and the better locking granularity is welcome with NUMA enabled
even when superpage support is not used.

Requested by:	alc
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D21982
This commit is contained in:
Mateusz Guzik 2019-10-22 22:55:46 +00:00
parent 15e33b5493
commit 61b8430f38
1 changed files with 4 additions and 4 deletions
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8
sys/amd64/amd64/pmap.c
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@ -322,7 +322,7 @@ pmap_pku_mask_bit(pmap_t pmap)
("address %lx beyond the last segment", (pa))); \
(pa) >> PDRSHIFT; \
})
#if VM_NRESERVLEVEL > 0
#ifdef NUMA
#define pa_to_pmdp(pa) (&pv_table[pa_index(pa)])
#define pa_to_pvh(pa) (&(pa_to_pmdp(pa)->pv_page))
#define PHYS_TO_PV_LIST_LOCK(pa) ({ \
@ -422,7 +422,7 @@ static int pmap_initialized;
*/
static TAILQ_HEAD(pch, pv_chunk) pv_chunks = TAILQ_HEAD_INITIALIZER(pv_chunks);
static struct mtx __exclusive_cache_line pv_chunks_mutex;
#if VM_NRESERVLEVEL > 0
#ifdef NUMA
struct pmap_large_md_page {
struct rwlock pv_lock;
struct md_page pv_page;
@ -947,7 +947,7 @@ SYSCTL_LONG(_vm_pmap, OID_AUTO, invl_wait_slow, CTLFLAG_RD, &invl_wait_slow, 0,
"Number of slow invalidation waits for lockless DI");
#endif
#if VM_NRESERVLEVEL > 0
#ifdef NUMA
static u_long *
pmap_delayed_invl_genp(vm_page_t m)
{
@ -1850,7 +1850,7 @@ pmap_page_init(vm_page_t m)
m->md.pat_mode = PAT_WRITE_BACK;
}
#if VM_NRESERVLEVEL > 0
#ifdef NUMA
static void
pmap_init_pv_table(void)
{