diff options
| author | nwhitehorn <nwhitehorn@FreeBSD.org> | 2015-01-19 05:14:07 +0000 |
|---|---|---|
| committer | nwhitehorn <nwhitehorn@FreeBSD.org> | 2015-01-19 05:14:07 +0000 |
| commit | 989d372488c4b535b35c80ce32ea34b54f2efb11 (patch) | |
| tree | a5a6b3a6d0fbada0744f982f471f63d9d428cd8f /sys/powerpc | |
| parent | af9bc7a40f2d38430430e3ed9591762b9efa6c2d (diff) | |
| download | FreeBSD-src-989d372488c4b535b35c80ce32ea34b54f2efb11.zip FreeBSD-src-989d372488c4b535b35c80ce32ea34b54f2efb11.tar.gz | |
Provide a tunable (machdep.moea64_bpvo_pool_size) to set the bootstrap
PVO pool size. The default errs on the exceedingly large side, so absent
any intelligent automatic tuning, at least let the user set it to save
RAM on memory-constrained systems.
MFC after: 2 weeks
Diffstat (limited to 'sys/powerpc')
| -rw-r--r-- | sys/powerpc/aim/mmu_oea64.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/sys/powerpc/aim/mmu_oea64.c b/sys/powerpc/aim/mmu_oea64.c index 1eb4b83..84ba8bb 100644 --- a/sys/powerpc/aim/mmu_oea64.c +++ b/sys/powerpc/aim/mmu_oea64.c @@ -221,9 +221,10 @@ struct pvo_head *moea64_pvo_table; /* pvo entries by pteg index */ uma_zone_t moea64_upvo_zone; /* zone for pvo entries for unmanaged pages */ uma_zone_t moea64_mpvo_zone; /* zone for pvo entries for managed pages */ -#define BPVO_POOL_SIZE 327680 static struct pvo_entry *moea64_bpvo_pool; static int moea64_bpvo_pool_index = 0; +static int moea64_bpvo_pool_size = 327680; +TUNABLE_INT("machdep.moea64_bpvo_pool_size", &moea64_bpvo_pool_size); SYSCTL_INT(_machdep, OID_AUTO, moea64_allocated_bpvo_entries, CTLFLAG_RD, &moea64_bpvo_pool_index, 0, ""); @@ -647,7 +648,7 @@ moea64_setup_direct_map(mmu_t mmup, vm_offset_t kernelstart, off = (vm_offset_t)(moea64_pvo_table); for (pa = off; pa < off + size; pa += PAGE_SIZE) moea64_kenter(mmup, pa, pa); - size = BPVO_POOL_SIZE*sizeof(struct pvo_entry); + size = moea64_bpvo_pool_size*sizeof(struct pvo_entry); off = (vm_offset_t)(moea64_bpvo_pool); for (pa = off; pa < off + size; pa += PAGE_SIZE) moea64_kenter(mmup, pa, pa); @@ -815,7 +816,7 @@ moea64_mid_bootstrap(mmu_t mmup, vm_offset_t kernelstart, vm_offset_t kernelend) * Initialise the unmanaged pvo pool. */ moea64_bpvo_pool = (struct pvo_entry *)moea64_bootstrap_alloc( - BPVO_POOL_SIZE*sizeof(struct pvo_entry), 0); + moea64_bpvo_pool_size*sizeof(struct pvo_entry), 0); moea64_bpvo_pool_index = 0; /* @@ -2282,10 +2283,10 @@ moea64_pvo_enter(mmu_t mmu, pmap_t pm, uma_zone_t zone, * If we aren't overwriting a mapping, try to allocate. */ if (bootstrap) { - if (moea64_bpvo_pool_index >= BPVO_POOL_SIZE) { + if (moea64_bpvo_pool_index >= moea64_bpvo_pool_size) { panic("moea64_enter: bpvo pool exhausted, %d, %d, %zd", - moea64_bpvo_pool_index, BPVO_POOL_SIZE, - BPVO_POOL_SIZE * sizeof(struct pvo_entry)); + moea64_bpvo_pool_index, moea64_bpvo_pool_size, + moea64_bpvo_pool_size * sizeof(struct pvo_entry)); } pvo = &moea64_bpvo_pool[moea64_bpvo_pool_index]; moea64_bpvo_pool_index++; |
