Date: Mon, 7 Sep 2009 22:15:48 +0400 From: pluknet <pluknet@gmail.com> To: FreeBSD Current <freebsd-current@freebsd.org>, freebsd-emulation@freebsd.org Subject: Re: acquiring duplicate lock of same type: "ftlk" Message-ID: <a31046fc0909071115td2d5309na5738a44402feaa9@mail.gmail.com> In-Reply-To: <a31046fc0908270158l63b103a7v6c9fd1b7be54d3ed@mail.gmail.com> References: <a31046fc0908270158l63b103a7v6c9fd1b7be54d3ed@mail.gmail.com>
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2009/8/27 pluknet <pluknet@gmail.com>: > Hi. > > Got it on FreeBSD 9.0-CURRENT while been running in Xorg, don't know > where exactly. > > Acquiring duplicate lock of same type: "ftlk" > =A01st ftlk @ /usr/src/sys/modules/linux/../../compat/linux/linux_futex.c= :177 > =A02nd ftlk @ /usr/src/sys/modules/linux/../../compat/linux/linux_futex.c= :203 > KDB: stack backtrace: > db_trace_self_wrapper(c07fd8ea,ea393b58,c060a145,c05fac1b,c08007b2,...) > at db_trace_self_wrapper+0x26 > kdb_backtrace(c05fac1b,c08007b2,c0b49757,c58ead20,ea393bb4,...) at > kdb_backtrace+0x29 > _witness_debugger(c08007b2,c0b49793,c0b49757,cb,0,...) at _witness_debugg= er+0x25 > witness_checkorder(c9bba780,9,c0b49757,cb,0,...) at witness_checkorder+0x= 469 > _sx_xlock(c9bba780,0,c0b49757,cb,0,...) at _sx_xlock+0x85 > futex_get0(c0609f8c,c09cc7a8,c9ac7764,c09cc7a8,c084df3c,...) at futex_get= 0+0x116 > linux_sys_futex(c9ac76c0,ea393cf8,ea393d18,ea393d1c,c0b4cf40,...) at > linux_sys_futex+0x6f > syscall(ea393d38) at syscall+0x2b4 > Xint0x80_syscall() at Xint0x80_syscall+0x20 > --- syscall (240, Linux ELF, linux_sys_futex), eip =3D 0x28799533, esp = =3D > 0xbfbfc0cc, ebp =3D 0x4000001 --- > > This time seeing this LOR again but with another one just before. lock order reversal: 1st 0xc75365b8 pseudofs (pseudofs) @ /usr/src/sys/kern/vfs_lookup.c:497 2nd 0xc088ea3c allproc (allproc) @ /usr/src/sys/kern/kern_proc.c:292 KDB: stack backtrace: db_trace_self_wrapper(c07fd8ea,e82148e4,c060a145,c05fac1b,c08008bf,...) at db_trace_self_wrapper+0x26 kdb_backtrace(c05fac1b,c08008bf,c58eabe8,c58e30d0,e8214940,...) at kdb_backtrace+0x29 _witness_debugger(c08008bf,c088ea3c,c07f981d,c58e30d0,c07f96f0,...) at _witness_debugger+0x25 witness_checkorder(c088ea3c,1,c07f96f0,124,0,...) at witness_checkorder+0x8= 39 _sx_slock(c088ea3c,0,c07f96f0,124,c73c4980,...) at _sx_slock+0x85 pfind(514,c72ba1a0,4,c07f8d78,c5fe1b40,...) at pfind+0x2f pfs_visible(0,0,c07f042d,7c,c7536560,...) at pfs_visible+0x3a pfs_lookup(e8214a40,c082715e,c7536560,c7536560,e8214bf8,...) at pfs_lookup+= 0x3dd VOP_CACHEDLOOKUP_APV(c0843960,e8214a40,e8214bf8,e8214be4,c73c4e80,...) at VOP_CACHEDLOOKUP_APV+0xc5 vfs_cache_lookup(e8214acc,c08087d0,c0875a00,200000,e8214bcc,...) at vfs_cache_lookup+0xd6 VOP_LOOKUP_APV(c0843960,e8214acc,e8214bf8,1f1,e8214be4,...) at VOP_LOOKUP_APV+0xe5 lookup(e8214bcc,c5fd1800,0,c5,c5ef77f8,...) at lookup+0x63b namei(e8214bcc,c5c1500d,3f3,e8214c20,c5c1500d,...) at namei+0x57f kern_alternate_path(c5fe1b40,c0b4921c,2879f478,0,e8214c74,...) at kern_alte= rnate _path+0x1cd linux_emul_convpath(c5fe1b40,2879f478,0,e8214c74,0,...) at linux_emul_convpath+0x3c linux_open(c5fe1b40,e8214cf8,e8214d18,e8214d1c,c0b4b58c,...) at linux_open+= 0x41 syscall(e8214d38) at syscall+0x2b4 Xint0x80_syscall() at Xint0x80_syscall+0x20 --- syscall (5, Linux ELF, linux_open), eip =3D 0x2889115e, esp =3D 0xbfbfbd1c, ebp =3D 0xbfbfbd6c --- acquiring duplicate lock of same type: "ftlk" [...] I'm running head from 08/26. There were recent changes in pseudofs. Could it be fixed? Looks like it's connected to running firefox3 with linprocfs (for adobe fla= sh). --=20 wbr, pluknet
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