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Code Issues Releases Activity

Revert the addition of VPO_BUSY and instead update vm_page_replace() to

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properly unbusy the page.

Submitted by:	alc
This commit is contained in:
John Baldwin 2013-08-09 21:14:55 +00:00
parent 8030839bd2
commit cdc00bf7d2
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=254163
2 changed files with 6 additions and 7 deletions
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12
sys/vm/vm_page.c
View File

@ -1174,6 +1174,8 @@ vm_page_prev(vm_page_t m)
/*
* Uses the page mnew as a replacement for an existing page at index
* pindex which must be already present in the object.
*
* The existing page must not be on a paging queue.
*/
vm_page_t
vm_page_replace(vm_page_t mnew, vm_object_t object, vm_pindex_t pindex)
@ -1198,16 +1200,14 @@ vm_page_replace(vm_page_t mnew, vm_object_t object, vm_pindex_t pindex)
mnew->object = object;
mnew->pindex = pindex;
mold = vm_radix_replace(&object->rtree, mnew, pindex);
KASSERT(mold->queue == PQ_NONE,
("vm_page_replace: mold is on a paging queue"));
/* Detach the old page from the resident tailq. */
TAILQ_REMOVE(&object->memq, mold, listq);
vm_page_lock(mold);
if (mold->oflags & VPO_BUSY) {
mold->oflags &= ~VPO_BUSY;
vm_page_flash(mold);
}
mold->object = NULL;
vm_page_unlock(mold);
vm_page_xunbusy(mold);
/* Insert the new page in the resident tailq. */
if (mpred != NULL)

1
sys/vm/vm_page.h
View File

@ -171,7 +171,6 @@ struct vm_page {
#define VPO_UNMANAGED 0x04 /* no PV management for page */
#define VPO_SWAPINPROG 0x08 /* swap I/O in progress on page */
#define VPO_NOSYNC 0x10 /* do not collect for syncer */
#define VPO_BUSY 0x20 /* TBD */
/*
* Busy page implementation details.