On Wednesday 13 January 2010 2:30:04 am pluknet wrote: > 2010/1/13 Gardner Bell <gbel...@rogers.com>: > > I got this lock order reversal while running a windows executable through > > wine. > > I'm guess that is a regression w.r.t S/G pager, which uses kmem_alloc/free > with vm_object locked and doesn't respect vm_map locks can sleep. > I'm curious it was back order before 5.1-R.
It's more that it can call free() during the VM object's destructor. Hmm, presumably the call to sglist_free() needs to be deferred. Note that both the SG and device pagers free fake vm_page_t objects using uma_zfree() from their destructors. I guess uma_zfree() will never call kmem_free() directly? -- John Baldwin _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
