[openib-general] ib_local_sa workqueue creation crash with ofed 1.2 + sles9sp3

[Steve WIse]

On Sat, 2007-01-20 at 09:27 -0600, Steve WIse wrote:
> BTW:  "local_sa" is still too long.  I reduced it to "lsa" and it
> worked.
> 

I cannot explain this.  The BUG_ON() is for (strlen(name) > 10).
"local_sa" is 8...9 if you count the NUL at the end.  

But I hit that BUG_ON() for rhel4u4 and sles9sp3.  I reduced the name to
"lsa" and it loads fine.

????



> 
> On Thu, 2007-01-18 at 14:09 -0800, Sean Hefty wrote:
> > Can you see if the call to create_singlethread_workqueue() passes in a string
> > longer than 8 characters?  If so, try reducing the size of the string.
> > 
> > I've committed a change to the local_sa.c file this morning to avoid this sort
> > of backport issue, if this is indeed what it is.
> > 
> > - Sean
> > 
> > >Loading ib_local_sa crashes on sles9sp3 with a BUG() trap.  Is this a
> > >known issue?
> > >
> > >----------- [cut here ] --------- [please bite here ] ---------
> > >Kernel BUG at workqueue:308
> > >invalid operand: 0000 [1] SMP
> > >CPU 0
> > >Pid: 7309, comm: modprobe Tainted: GF  U   (2.6.5-7.244-smp SLES9_SP3_BRANCH-
> > >200512121832250000)
> > >RIP: 0010:[<ffffffff8014f9c1>] <ffffffff8014f9c1>{__create_workqueue+33}
> > >RSP: 0000:000001003f4f7d38  EFLAGS: 00010202
> > >RAX: 000000000000000b RBX: ffffffffa02b4e69 RCX: 0000000000000bb8
> > >RDX: 0000000000000bb8 RSI: 0000000000000001 RDI: ffffffffa02b4e69
> > >RBP: 0000000000000001 R08: 000000000000003d R09: 0000000000000000
> > >R10: 00000000000493e0 R11: 0000000000000001 R12: ffffffff803e3fc0
> > >R13: 000000000000000a R14: ffffffff803e3fc0 R15: 0000000000000000
> > >FS:  0000002a95894b00(0000) GS:ffffffff8057cc00(0000) knlGS:0000000000000000
> > >CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
> > >CR2: 0000000000539ccf CR3: 0000000000101000 CR4: 00000000000006e0
> > >Process modprobe (pid: 7309, threadinfo 000001003f4f6000, task
> > >000001001fcdc9e0)
> > >Stack: 000001003fe3f350 ffffffff803e4020 ffffffffa02b7180 ffffffff803e3fc0
> > >       000000000000000a ffffffff803e3fc0 ffffffffa02b2300 ffffffffa02bd08f
> > >       ffffffff803e4020 ffffffff8015d4dd
> > >Call Trace:<ffffffffa02bd08f>{:ib_local_sa:sa_db_init+143}
> > ><ffffffff8015d4dd>{sys_init_module+6589}
> > >       <ffffffff80166d5b>{generic_file_read+187}
> > ><ffffffffa02bd000>{:ib_local_sa:sa_db_init+0}
> > >       <ffffffff8018da34>{vfs_read+244} <ffffffff8018dc8d>{sys_read+157}
> > >       <ffffffff80110694>{system_call+124}
> > >
> > >Code: 0f 0b 17 66 38 80 ff ff ff ff 34 01 66 66 90 48 8b 3d 61 50
> > >RIP <ffffffff8014f9c1>{__create_workqueue+33} RSP <000001003f4f7d38>
> > >
> > >
> > >
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> 
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