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    SubjectRe: [PATCH] Chaining sg lists for big IO commands v5
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    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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