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Make a couple refinements to r216799 and r216810. In particular, revise

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a comment and move it to its proper place.

Reviewed by:	kib
This commit is contained in:
alc 2011-01-01 17:39:38 +00:00
parent 688b83a0a6
commit 7fb616e10a
1 changed files with 8 additions and 10 deletions
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18
sys/vm/vm_object.c
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@ -755,6 +755,12 @@ vm_object_terminate(vm_object_t object)
vm_object_destroy(object);
}
/*
* Make the page read-only so that we can clear the object flags. However, if
* this is a nosync mmap then the object is likely to stay dirty so do not
* mess with the page and do not clear the object flags. Returns TRUE if the
* page should be flushed, and FALSE otherwise.
*/
static boolean_t
vm_object_page_remove_write(vm_page_t p, int flags, int *clearobjflags)
{
@ -808,15 +814,7 @@ vm_object_page_clean(vm_object_t object, vm_pindex_t start, vm_pindex_t end,
pagerflags |= (flags & OBJPC_INVAL) != 0 ? VM_PAGER_PUT_INVAL : 0;
tend = (end == 0) ? object->size : end;
/*
* Make the page read-only so we can then clear the object flags.
*
* However, if this is a nosync mmap then the object is likely to
* stay dirty so do not mess with the page and do not clear the
* object flags.
*/
clearobjflags = 1;
clearobjflags = start == 0 && tend == object->size;
rescan:
curgeneration = object->generation;
@ -847,7 +845,7 @@ rescan:
VOP_FSYNC(vp, (pagerflags & VM_PAGER_PUT_SYNC) ? MNT_WAIT : 0);
#endif
if (clearobjflags && start == 0 && tend == object->size)
if (clearobjflags)
vm_object_clear_flag(object, OBJ_MIGHTBEDIRTY);
}