linux-kernel - Re: [PATCH] Chaining sg lists for big IO commands v5

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Date:	Wed, 16 May 2007 13:58:06 -0700
From:	Badari Pulavarty <pbadari@...il.com>
To:	Jens Axboe <jens.axboe@...cle.com>
Cc:	lkml <linux-kernel@...r.kernel.org>, bhalevy@...asas.com,
	Andrew Morton <akpm@...ux-foundation.org>,
	fujita.tomonori@....ntt.co.jp, michaelc@...wisc.edu
Subject: Re: [PATCH] Chaining sg lists for big IO commands v5

On Tue, 2007-05-15 at 19:50 +0200, Jens Axboe wrote:
> On Tue, May 15 2007, Badari Pulavarty wrote:
> > On Tue, 2007-05-15 at 19:20 +0200, Jens Axboe wrote:
> > > On Tue, May 15 2007, Badari Pulavarty wrote:
> > > > On Fri, 2007-05-11 at 15:51 +0200, Jens Axboe wrote:
> > > > > Hi,
> > > > > 
> > > > > Updated version of the patch - this time I'll just attach the patch
> > > > > file...
> > > > 
> > > > Missing scatterlist.h inclusions..
> > > > 
> > > > drivers/scsi/sym53c8xx_2/sym_glue.c: In function ???sym_scatter???:
> > > > drivers/scsi/sym53c8xx_2/sym_glue.c:385: warning: implicit declaration
> > > > of function ???for_each_sg???
> > > > drivers/scsi/sym53c8xx_2/sym_glue.c:385: error: expected ???;??? before ???{???
> > > > token
> > > > drivers/scsi/sym53c8xx_2/sym_glue.c:375: warning: unused variable ???tp???
> > > > make[3]: *** [drivers/scsi/sym53c8xx_2/sym_glue.o] Error 1
> > > > 
> > > > 
> > > > drivers/scsi/qla2xxx/qla_iocb.c: In function ???qla24xx_build_scsi_iocbs???:
> > > > drivers/scsi/qla2xxx/qla_iocb.c:678: warning: implicit declaration of
> > > > function ???for_each_sg???
> > > > drivers/scsi/qla2xxx/qla_iocb.c:678: error: expected ???;??? before ???{???
> > > > token
> > > 
> > > Thanks, will fix those. What arch? I tested it here.
> > 
> > I am playing with them on ppc64.
> 
> Ah ok, you need the updated patch series for ppc64 support. Builds fine
> here on ppc64. See the #sglist branch of the block repo:
> 
> git://git.kernel.dk/data/git/linux-2.6-block.git
> 
> I can mail you an updated patch, if you want.
> 

paniced my amd64 box on boot :(

Unable to handle kernel NULL pointer dereference at 000000000000001e
RIP:
 [<ffffffff80381aa1>] blk_rq_map_sg+0x71/0x1b0
PGD 0
Oops: 0000 [1] SMP
CPU 0
Modules linked in:
Pid: 1, comm: swapper Not tainted 2.6.22-rc1 #2
RIP: 0010:[<ffffffff80381aa1>]  [<ffffffff80381aa1>] blk_rq_map_sg
+0x71/0x1b0
RSP: 0000:ffff810180239330  EFLAGS: 00010287
RAX: 0000000179d0ffff RBX: ffff8101bf204320 RCX: 0000000000001000
RDX: ffff810179c62000 RSI: ffff8101df507780 RDI: 0000000000179d00


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