I've committed one bug fix to the 'found dirty cache page' bug --
turns out vm_map_split() was the culprit, renaming pages
without removing them from PQ_CACHE. The bug was introduced
in -3.0, and hit the KASSERT() I put in -4.x.
I've committed a general inlining of 'changing the page dirty
status to VM_PAGE_BITS_ALL' and put a sanity check in the inline.
If this problem occurs again, you will get a different panic.
One of:
vm_page_dirty: page in cache!
vm_page_busy: page already busy!!!
vm_page_wakeup: page not busy!!!
If your box drops into DDB, please get a backtrace and report
it to the list or to me and we should be able to track down
any remaining dirty-pages-in-PQ_CACHE bugs.
-Matt
Matthew Dillon
<dil...@backplane.com>
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