The following reply was made to PR kern/161887; it has been noted by GNATS.
From: Andriy Gapon <[email protected]> To: Penta Upa <[email protected]> Cc: [email protected] Subject: Re: kern/161887: [vm] [panic] panic at vm_page_wire with FreeBSD 9.0 Beta 3 [regression] Date: Sun, 30 Oct 2011 19:00:28 +0200 on 30/10/2011 18:17 Penta Upa said the following: > > > On Sun, Oct 30, 2011 at 4:01 PM, Andriy Gapon <[email protected] > <mailto:[email protected]>> wrote: > > > Do you build your test module as a part of a kernel+modules build or do > you > build it in isolation? If the latter, then this could be a known obscure > problem. > > External. For example built in /home/penta/vmtest > > > > A standalone module build doesn't get some important definitions from > kernel > config (e.g. via opt_global.h) and can be in a serious disagreement > with the > kernel. In particular, if a kernel is built with SMP option, but a > module build > doesn't have SMP defined, then they will have different definitions of > PA_LOCK_COUNT and thus would work on different actual locks when > manipulating > the same page. > > Ok and it seems like they are operating on different locks then. > vm_page_assert() succeeds in the module but immediately fails in > vm_page_wire(). > But then isn't vm_page_wire/unwire() and exported kernel api (i assumed it is > since there is a man page entry), so shouldn't it succeed irrespective of the > kernel config and irrespective of the location of the build. You described how things should be and I described how they are at the moment. -- Andriy Gapon _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-bugs To unsubscribe, send any mail to "[email protected]"
