Re: smp dead lock of io_request_lock/queue_lock patch

From: Jens Axboe (axboe_at_suse.de)
Date: 01/15/04

  • Next message: Klaus Dittrich: "linux-2.6.1-smp,usb,oops,sane-backends-1.0.13,epson-1640" 
    Date:	Thu, 15 Jan 2004 18:05:03 +0100
To: Bill Davidsen <davidsen@tmr.com>

    On Thu, Jan 15 2004, Bill Davidsen wrote:
    > Doug Ledford wrote:
    > >On Mon, 2004-01-12 at 04:22, Jens Axboe wrote:
    > >
    > >>On Mon, Jan 12 2004, Arjan van de Ven wrote:
    > >>
    > >>>On Mon, Jan 12, 2004 at 10:19:46AM +0100, Jens Axboe wrote:
    > >>>
    > >>>>... and still exists in your 2.4.21 based kernel.
    > >>>
    > >>>The RHL 2.4.21 kernels don't have the locking patch at all...
    > >>
    > >>But RHEL3 does:
    > >>
    > >>http://kernelnewbies.org/kernels/rhel3/SOURCES/linux-2.4.21-iorl.patch
    > >>
    > >>and the bug is there.
    > >
    > >
    > >But in RHEL3 the bug is fixed already (not in a released kernel, but the
    > >fix went into our internal kernel some time back and will be in our next
    > >update kernel). From my internal bk tree for this stuff:
    >
    > "not in a released kernel..." Do I read this right? That you have a fix
    > for a critical bug and it hasn't been pushed to customers yet? How about
    > security bugs, has the fix you pushed in RH-9.0 been push to EL customers?

    Calm down, it's a bug fix for a deadlock that _could_ trigger on SMP
    only in SCSI error recovery. 

    -- 
Jens Axboe
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