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Automatically prefault a limited number of mappings to resident pages in

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shmat(2), just like mmap(2).

MFC after:	5 days
Sponsored by:	EMC / Isilon Storage Division
This commit is contained in:
Alan Cox 2014-08-31 17:38:41 +00:00
parent f2e71517e0
commit 01a8fb7db5
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=270883
1 changed files with 3 additions and 3 deletions
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6
sys/kern/sysv_shm.c
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@ -410,9 +410,9 @@ kern_shmat(td, shmid, shmaddr, shmflg)
}
vm_object_reference(shmseg->object);
rv = vm_map_find(&p->p_vmspace->vm_map, shmseg->object,
0, &attach_va, size, 0, shmaddr != NULL ? VMFS_NO_SPACE :
VMFS_OPTIMAL_SPACE, prot, prot, MAP_INHERIT_SHARE);
rv = vm_map_find(&p->p_vmspace->vm_map, shmseg->object, 0, &attach_va,
size, 0, shmaddr != NULL ? VMFS_NO_SPACE : VMFS_OPTIMAL_SPACE,
prot, prot, MAP_INHERIT_SHARE | MAP_PREFAULT_PARTIAL);
if (rv != KERN_SUCCESS) {
vm_object_deallocate(shmseg->object);
error = ENOMEM;