Date: Sun, 8 Oct 2006 16:43:08 -0400 From: Kris Kennaway <kris@obsecurity.org> To: "R. B. Riddick" <arne_woerner@yahoo.com> Cc: freebsd-fs@freebsd.org, Kris Kennaway <kris@obsecurity.org> Subject: Re: 2 bonnies can stop disk activity permanently Message-ID: <20061008204308.GA7702@xor.obsecurity.org> In-Reply-To: <20061008203349.84148.qmail@web30312.mail.mud.yahoo.com> References: <20061008203349.84148.qmail@web30312.mail.mud.yahoo.com>
next in thread | previous in thread | raw e-mail | index | archive | help
--mP3DRpeJDSE+ciuQ Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sun, Oct 08, 2006 at 01:33:49PM -0700, R. B. Riddick wrote: > Bruce wrote: > >On Sun, 8 Oct 2006, Scott Long wrote: > >> Kris Kennaway wrote: > >>> You forgot to even mention what version you're running ;-) > >>>=20 > >>> Also show your kernel config file. Configure DDB per the chapter on > >>> > >> No need for all of that information, the bug in vfs_bio.c is quite obv= ious.=20 > >> =3D-( Fixing it will take some thought, though. > > > >Is it really obvious? I think it is only obvious that many things are > >not quite right. The quick fix of increasing BKVASIZE to the size of > >the largest buffer used should still work to prevent bkva fragmentation. > > > OK: The FBSD version was varying: R6.1, R6.1-CURRENT, R7-CURRENT. >=20 > But we just found out, that it happens when we use "newfs -b 65536", but = not with default "-b" value (whatever that might be)... >=20 > So if somebody wants to reproduce it, he/she should use >R6 and "newfs -b= 65536"... > I think that were all steps to do... Thanks, I can now reproduce on 7.0. 8197 3980 8197 0 S+ nbufkv 0xc07cec08 bonnie 8196 3980 8196 0 S+ nbufkv 0xc07cec08 bonnie db> wh 8197 Tracing pid 8197 tid 100205 td 0xc87a6510 sched_switch(c87a6510,0,1,15e,4,...) at sched_switch+0x120 mi_switch(1,0,c0758aba,1bf,0,...) at mi_switch+0x1b2 sleepq_switch(c07c5390,0,c0758aba,211,ec9217d0,...) at sleepq_switch+0xee sleepq_wait(c07cec08,0,c075614c,c9,0,...) at sleepq_wait+0x3e msleep(c07cec08,c07cec0c,50,c075dece,0,...) at msleep+0x171 getnewbuf(10000,10000,c075da89,9fe,10000,...) at getnewbuf+0x319 getblk(c5d58514,fffffff4,ffffffff,10000,0,...) at getblk+0x307 breadn(c5d58514,fffffff4,ffffffff,10000,0,...) at breadn+0x4d bread(c5d58514,fffffff4,ffffffff,10000,0,...) at bread+0x4c ffs_balloc_ufs2(c5d58514,273a000,0,2000,c51b0e00,...) at ffs_balloc_ufs2+0x= 5ab ffs_write(ec921b9c,0,c07535f4,0,0,...) at ffs_write+0x2f2 VOP_WRITE_APV(c07ada20,ec921b9c,c87a6510,c54d5c60,2,...) at VOP_WRITE_APV+0= x9a vn_write(c54d5c60,ec921c64,c51b0e00,0,c87a6510,...) at vn_write+0x1d5 dofilewrite(c54d5c60,ec921c64,ffffffff,ffffffff,0,...) at dofilewrite+0x7c kern_writev(c87a6510,3,ec921c64,bfbfc820,2000,...) at kern_writev+0x6b write(c87a6510,ec921d04,c,158,3,...) at write+0x4d syscall(820003b,3b,bfbf003b,0,2000,...) at syscall+0x152 Xint0x80_syscall() at Xint0x80_syscall+0x1f --- syscall (4, FreeBSD ELF32, write), eip =3D 0x28155dff, esp =3D 0xbfbf73= 6c, ebp =3D 0xbfbfe838 --- db> wh 8196 Tracing pid 8196 tid 100138 td 0xc50c3d80 sched_switch(c50c3d80,0,1,15e,246,...) at sched_switch+0x120 mi_switch(1,0,c0758aba,1bf,0,...) at mi_switch+0x1b2 sleepq_switch(c07c5390,0,c0758aba,211,ec79b820,...) at sleepq_switch+0xee sleepq_wait(c07cec08,0,c075614c,c9,0,...) at sleepq_wait+0x3e msleep(c07cec08,c07cec0c,50,c075dece,0,...) at msleep+0x171 getnewbuf(10000,10000,c075da89,9fe,10000,...) at getnewbuf+0x319 getblk(c5e6d514,fffffff4,ffffffff,10000,0,...) at getblk+0x307 ufs_bmaparray(c5e6d514,3cc,0,ec79b994,0,...) at ufs_bmaparray+0x298 ufs_bmap(ec79b9dc,c075da89,1ac) at ufs_bmap+0x69 VOP_BMAP_APV(c07ada20,ec79b9dc,c075da89,3b7,ffffffff,...) at VOP_BMAP_APV+0= x72 bdwrite(ddbe5790,0,ec79bc64,2000,c51b0e00,...) at bdwrite+0x485 ffs_write(ec79bb9c,0,c07535f4,0,0,...) at ffs_write+0x5b5 VOP_WRITE_APV(c07ada20,ec79bb9c,c50c3d80,c5058c60,2,...) at VOP_WRITE_APV+0= x9a vn_write(c5058c60,ec79bc64,c51b0e00,0,c50c3d80,...) at vn_write+0x1d5 dofilewrite(c5058c60,ec79bc64,ffffffff,ffffffff,0,...) at dofilewrite+0x7c kern_writev(c50c3d80,3,ec79bc64,bfbfe820,0,...) at kern_writev+0x6b write(c50c3d80,ec79bd04,c,158,3,...) at write+0x4d syscall(3b,3b,bfbf003b,0,2000,...) at syscall+0x152 Xint0x80_syscall() at Xint0x80_syscall+0x1f --- syscall (4, FreeBSD ELF32, write), eip =3D 0x28155dff, esp =3D 0xbfbf73= 6c, ebp =3D 0xbfbfe838 --- db> Kris --mP3DRpeJDSE+ciuQ Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (FreeBSD) iD8DBQFFKWLbWry0BWjoQKURAhYEAKCr/KsTlrpfgcn5JPq6Lc7HcY/LBwCgjsDn NCg2VRMnxO8xbit/xmqKtuQ= =ror+ -----END PGP SIGNATURE----- --mP3DRpeJDSE+ciuQ--
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20061008204308.GA7702>