Date: Wed, 20 Dec 2006 14:40:32 +0200 From: Kostik Belousov <kostikbel@gmail.com> To: Dmitry Pryanishnikov <dmitry@atlantis.dp.ua> Cc: freebsd-current@freebsd.org Subject: Re: ddb(4) spoils kernel stack in CURRENT? Message-ID: <20061220124032.GC23698@deviant.kiev.zoral.com.ua> In-Reply-To: <20061220130559.P54963@atlantis.atlantis.dp.ua> References: <20061219175917.L84683@atlantis.atlantis.dp.ua> <20061220130559.P54963@atlantis.atlantis.dp.ua>
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--9aHjqRFB8NC1b71K Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Dec 20, 2006 at 01:18:39PM +0200, Dmitry Pryanishnikov wrote: >=20 > Hello! >=20 > On Tue, 19 Dec 2006, Dmitry Pryanishnikov wrote: > >I've tried to repeat this under the RELENG_6 as of 30-Oct (just removing > >kernel options COMPAT_43TTY, COMPAT_FREEBSD6, INVARIANTS,=20 > >INVARIANT_SUPPORT, > >and using 'debug.kdb.enter' instead of 'debug.kdb.panic') - and kgdb=20 > >unwinds > >the stack even if the dump got via typing 'panic' from ddb: >=20 > Today I've tried this with the fresh (20-Dec) RELENG_6 and with=20 > INVARIANTS* > (so the only difference between kernel configs are CURRENT-only options > COMPAT_43TTY and COMPAT_FREEBSD6). No differences - kgdb successfully > unwinds the stack under RELENG_6. It seems that the following stands: >=20 > >So it looks like a regression in CURRENT vs RELENG_6 (either ddb 'spoils= '=20 > >the stack somehow, or kgdb fails to unwind it). Could you further localize the problem, i.e. try to backtrace CURRENT dump by RELENG_6 kgdb and vice versa. --9aHjqRFB8NC1b71K Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (FreeBSD) iD8DBQFFiS9AC3+MBN1Mb4gRAvlSAKDtjEQn4EDw8vr9gg8fZ/BGw0fdHgCffsBI WN9b9WVTAijUEYiVRO+Elas= =LMby -----END PGP SIGNATURE----- --9aHjqRFB8NC1b71K--
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