FreeBSD Manual Pages
VM_PAGE_GRAB(9) BSD Kernel Developer's Manual VM_PAGE_GRAB(9) NAME vm_page_grab -- returns a page from an object SYNOPSIS #include <sys/param.h> #include <vm/vm.h> #include <vm/vm_page.h> vm_page_t vm_page_grab(vm_object_t object, vm_pindex_t pindex, int allocflags); DESCRIPTION The vm_page_grab() function returns the page at pindex from the given ob- ject. If the page exists and is busy, vm_page_grab() will sleep while waiting for it. If the page does not exist, it is allocated. The func- tion sleeps until the allocation request can be satisfied. The function requires the object to be locked on entry, and returns with the object locked. If the vm_page_grab() function sleeps for any reason, the object lock is temporary dropped. The vm_page_grab() supports all of the flags supported by vm_page_alloc(9). In addition, vm_page_grab() supports the following flags: VM_ALLOC_IGN_SBUSY When waiting for the busy state of the existing page to drain, only test for exclusive busy; ignore the shared busy counter. RETURN VALUES The vm_page_grab() always returns the page. SEE ALSO vm_page_alloc(9) AUTHORS This manual page was written by Chad David <davidc@acns.ab.ca>. BSD August 23, 2013 BSD
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUES | SEE ALSO | AUTHORS
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