Date: Thu, 20 Aug 2009 23:01:01 +0300 From: Kostik Belousov <kostikbel@gmail.com> To: Ulrich Sp??rlein <uqs@spoerlein.net>, emulation@freebsd.org Subject: Re: acquiring duplicate lock of same type: "ftlk" Message-ID: <20090820200101.GW9623@deviant.kiev.zoral.com.ua> In-Reply-To: <20090820194932.GA66475@acme.spoerlein.net> References: <20090820194932.GA66475@acme.spoerlein.net>
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--p51eBkY87UC7w4vh Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Aug 20, 2009 at 09:49:32PM +0200, Ulrich Sp??rlein wrote: > Hi, I'm on RELENG_8/amd64 now and while using flash inside FF3 I > observed the following >=20 > acquiring duplicate lock of same type: "ftlk" > 1st ftlk @ /data/freebsd-head/sys/modules/linux/../../compat/linux/linux= _futex.c:177 > 2nd ftlk @ /data/freebsd-head/sys/modules/linux/../../compat/linux/linux= _futex.c:203 > KDB: stack backtrace: > db_trace_self_wrapper() at db_trace_self_wrapper+0x2a > _witness_debugger() at _witness_debugger+0x2e > witness_checkorder() at witness_checkorder+0x8ef > _sx_xlock() at _sx_xlock+0x55 > futex_get0() at futex_get0+0xfe > linux_sys_futex() at linux_sys_futex+0x96 > ia32_syscall() at ia32_syscall+0x19c > Xint0x80_syscall() at Xint0x80_syscall+0x95 > --- syscall (240, Linux ELF32, linux_sys_futex), rip =3D 0x287d89b3, rsp = =3D 0xffffaa8c, rbp =3D 0x4000001 --- >=20 > I'm running with linux-f8 (f10 gave me trouble last time I tried on CURRE= NT) and flash10. >=20 > Is this a known problem? Is someone working on this or shall I file a PR? >=20 > Regards, > Uli >=20 > PS: please keep me CC'ed. thx. This is a known and harmless issue. We need sx_xlock_flags(). --p51eBkY87UC7w4vh Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (FreeBSD) iEYEARECAAYFAkqNq3wACgkQC3+MBN1Mb4gw0gCg2eLcCmB44sabC0ctvnctdybW 7dEAnR13qp2eR5V6uEt45cs6uJ/MXYdS =6959 -----END PGP SIGNATURE----- --p51eBkY87UC7w4vh--
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