Hello, "Juergen Hannken-Illjes" <hann...@netbsd.org> wrote: > Module Name: src > Committed By: hannken > Date: Fri Jun 17 09:50:52 UTC 2011 > > Modified Files: > src/sys/uvm: uvm_bio.c > > Log Message: > When ubc_alloc() reuses a cached mapping window remove the object from > the lists AFTER clearing its mapping. > > Removes a race where uvm_obj_destroy() sees an empty uo_ubc list and > destroys the object before ubc_alloc() gets the objects lock to clear > the mapping.
How is this relevant, since the entries are protected by ubc_object's lock, which is held across ubc_alloc() and ubc_purge() parts? -- Mindaugas
