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MFamd64

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Eliminate unnecessary, recursive acquisitions and releases of the page
 queues lock by free_pv_entry() and pmap_remove_pages().

 Reduce the scope of the page queues lock in pmap_remove_pages().
This commit is contained in:
Alan Cox 2006-06-05 06:08:21 +00:00
parent 991d907d3e
commit 62b5e735a6
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=159244
1 changed files with 2 additions and 5 deletions
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7
sys/i386/i386/pmap.c
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@ -1698,6 +1698,7 @@ free_pv_entry(pmap_t pmap, pv_entry_t pv)
struct pv_chunk *pc;
int idx, field, bit;
mtx_assert(&vm_page_queue_mtx, MA_OWNED);
PV_STAT(pv_entry_frees++);
PV_STAT(pv_entry_spare++);
pv_entry_count--;
@ -1719,10 +1720,8 @@ free_pv_entry(pmap_t pmap, pv_entry_t pv)
TAILQ_REMOVE(&pmap->pm_pvchunk, pc, pc_list);
m = PHYS_TO_VM_PAGE(pmap_kextract((vm_offset_t)pc));
pmap_qremove((vm_offset_t)pc, 1);
vm_page_lock_queues();
vm_page_unwire(m, 0);
vm_page_free(m);
vm_page_unlock_queues();
pmap_ptelist_free(&pv_vafree, (vm_offset_t)pc);
}
@ -2970,17 +2969,15 @@ pmap_remove_pages(pmap_t pmap)
TAILQ_REMOVE(&pmap->pm_pvchunk, pc, pc_list);
m = PHYS_TO_VM_PAGE(pmap_kextract((vm_offset_t)pc));
pmap_qremove((vm_offset_t)pc, 1);
vm_page_lock_queues();
vm_page_unwire(m, 0);
vm_page_free(m);
vm_page_unlock_queues();
pmap_ptelist_free(&pv_vafree, (vm_offset_t)pc);
}
}
sched_unpin();
vm_page_unlock_queues();
pmap_invalidate_all(pmap);
PMAP_UNLOCK(pmap);
vm_page_unlock_queues();
}
/*