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Fix problem with freeing busy pages reported by Nick Sayer.
Submitted by: John Dyson
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parent
965d72e637
commit
6a1c735df7
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=5918
@ -18,7 +18,7 @@
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* 5. Modifications may be freely made to this file if the above conditions
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* are met.
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*
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* $Id: vfs_bio.c,v 1.24 1995/01/21 06:32:26 ache Exp $
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* $Id: vfs_bio.c,v 1.25 1995/01/24 10:00:43 davidg Exp $
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*/
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/*
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@ -888,7 +888,7 @@ allocbuf(struct buf * bp, int size, int vmio)
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for (i = desiredpages; i < bp->b_npages; i++) {
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m = bp->b_pages[i];
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s = splhigh();
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if ((m->flags & PG_BUSY) || (m->busy != 0)) {
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while ((m->flags & PG_BUSY) || (m->busy != 0)) {
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m->flags |= PG_WANTED;
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tsleep(m, PVM, "biodep", 0);
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}
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@ -901,8 +901,10 @@ allocbuf(struct buf * bp, int size, int vmio)
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--m->bmapped;
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if (m->bmapped == 0) {
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PAGE_WAKEUP(m);
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pmap_page_protect(VM_PAGE_TO_PHYS(m), VM_PROT_NONE);
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vm_page_free(m);
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if (m->valid == 0) {
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pmap_page_protect(VM_PAGE_TO_PHYS(m), VM_PROT_NONE);
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vm_page_free(m);
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}
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}
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bp->b_pages[i] = NULL;
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}
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