Date: Thu, 4 Jul 2013 11:21:13 +0300 From: Konstantin Belousov <kostikbel@gmail.com> To: Ian FREISLICH <ianf@clue.co.za> Cc: current@freebsd.org Subject: Re: Filesystem wedges caused by r251446 Message-ID: <20130704082113.GJ91021@kib.kiev.ua> In-Reply-To: <E1Uudqq-0001ka-E7@clue.co.za> References: <E1Uudqq-0001ka-E7@clue.co.za>
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--m4ZQ3NHD/ILiPeC+ Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Jul 04, 2013 at 09:21:11AM +0200, Ian FREISLICH wrote: > Hi >=20 > I've been experiencing process wedges writing files. It occurs > reliably under "heavy" IO activity, perhaps with large files but > I'm not entirely sure what the trigger is. The symptom is that > during an installworld, it reliably hangs the install process on > /usr/bin/clang (sometimes it hangs earlier at the mtree on /usr) >=20 > The problem leaves the filesystem in a state where it cannot be > cleanly unmounted. A binary search pins the offending commit on > r251446. >=20 > The major differences between the working system and the broken one > are, CPU, RAM and arch (i386/amd64) they are otherwise identical > Dell R200 servers. >=20 > Working: > CPU: Intel(R) Core(TM)2 Duo CPU E4600 @ 2.40GHz (2400.14-MHz 686-cla= ss CPU) > RAM: 2G > Arch: i386 >=20 > Broken: > CPU: Intel(R) Core(TM)2 Duo CPU E7300 @ 2.66GHz (2666.82-MHz K8-clas= s CPU) > RAM: 4G > Arch: amd64 >=20 > The compiler, gcc, clang (trunk or release) has no effect. >=20 > Working CPU: > FreeBSD 10.0-CURRENT #6 r252384: Sun Jun 30 08:36:31 SAST 2013 > ianf@fw2:/usr/obj/usr/src/sys/FIREWALL i386 > FreeBSD clang version 3.3 (tags/RELEASE_33/final 183502) 20130610 > CPU: Intel(R) Core(TM)2 Duo CPU E4600 @ 2.40GHz (2400.14-MHz 686-cla= ss CPU) > Origin =3D "GenuineIntel" Id =3D 0x6fd Family =3D 0x6 Model =3D 0xf = Stepping =3D 13 > Features=3D0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,= PGE,MCA,C > MOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE> > Features2=3D0xe39d<SSE3,DTES64,MON,DS_CPL,EST,TM2,SSSE3,CX16,xTPR,PDCM> > AMD Features=3D0x20100000<NX,LM> > AMD Features2=3D0x1<LAHF> > TSC: P-state invariant, performance statistics > real memory =3D 2147483648 (2048 MB) > avail memory =3D 2076581888 (1980 MB) >=20 >=20 > Broken on: > FreeBSD 10.0-CURRENT #19 r251445: Thu Jul 4 08:39:21 SAST 2013 > ianf@fw1:/usr/obj/usr/src/sys/FIREWALL amd64 > FreeBSD clang version 3.3 (trunk 178860) 20130405 > CPU: Intel(R) Core(TM)2 Duo CPU E7300 @ 2.66GHz (2666.82-MHz K8-clas= s CPU) > Origin =3D "GenuineIntel" Id =3D 0x10676 Family =3D 0x6 Model =3D 0x= 17 Stepping =3D 6 > Features=3D0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,= PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE> > Features2=3D0x8e39d<SSE3,DTES64,MON,DS_CPL,EST,TM2,SSSE3,CX16,xTPR,PDCM= ,SSE4.1> > AMD Features=3D0x20100800<SYSCALL,NX,LM> > AMD Features2=3D0x1<LAHF> > TSC: P-state invariant, performance statistics > real memory =3D 4294967296 (4096 MB) > avail memory =3D 3970727936 (3786 MB) Care to provide any useful information ? http://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/kernel= debug-deadlocks.html --m4ZQ3NHD/ILiPeC+ Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.20 (FreeBSD) iQIcBAEBAgAGBQJR1TB4AAoJEJDCuSvBvK1Bv5MP/jIMRmoQzgi+Dy3w1t/rqdw/ +OwhaY3NgXsB0UQwPoQKmSfP9ZT2bAhsMbBE5sqB77vxkKzdBz623kpG6nwvBQbd Ix/2XajKiQzEMKKaXUG0vUQlD4xEwfzfu77xyNEFlC5wuFCWpqyFSlp84VE1Fhd0 oWTWWubqz67QkT+jLnKwMPmN/2MJ9397aspq87DU7wJNo38i59uMpKduD1viGEwN w9bi7k307RbGp8hdT86mhXyqYzfmxsO1qBHYug7pZNQzEOwdacB3K3CTJMtvSQ8o NkEYiAWfbGR+2BGa3qHYhl4OzQr5jcyrBsvFc07mLfcpYmnEUxJz6wC/GeBUHSsm YbPveyjyWFVyN10CYadOgYlti480JNFBUQ22uTIqIdmXnggfXRxnlWEqlaQC7qc1 F5se2107wSrev0+217fk8ZWChgWPYHfG3Jdcsn6Mg06FPvWbMQHHXhUXWWzZdCCP cKK4BFCCBoHM5itz1WzNqqhLwumxuJW2+NjsbbcdWsRdYQNFgZbBha39nw+j379P OID/QG8j+dq0o8fCg5uhWiSr0v6P9Ty8ySFGASWg6zp/DTff8lgO3VOQdX9QIIgT ldowPjsLfJaofFITFEUzVE9aeSSd0sWTVcu8oIk9UIlARvoS3nNN29HMG56IgpPU seoJZuqsCdRus/WF+VFa =7tVy -----END PGP SIGNATURE----- --m4ZQ3NHD/ILiPeC+--
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