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do_test
2010 Jun 05
2
[PATCH] kmmio/mmiotrace: fix double free of kmmio_fault_pages
After every iounmap mmiotrace has to free kmmio_fault_pages, but it
can't do it directly, so it defers freeing by RCU.
It usually works, but when mmiotraced code calls ioremap-iounmap
multiple times without sleeping between (so RCU won't kick in and
start freeing) it can be given the same virtual address, so at
every iounmap mmiotrace will schedule the same pages for release.
Obviously it