Messages in this thread | | | Date | Fri, 18 Apr 2003 10:30:31 -0700 | From | Patrick Mansfield <> | Subject | Re: kernel panic with 2.5.67-ac1 |
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On Fri, Apr 18, 2003 at 10:18:06AM -0700, Christian Staudenmayer wrote: > Note: this does not happen with 2.4.20, 2.4.21-pre7, 2.4.21-pre7-ac1 or 2.5.67-bk8 > It does, however happen with 2.5.67-ac2, but the error message is some lines longer > and some of the addresses have changed. > > I'd be really grateful for any insight on this problem.
We were plugging a queue that was about to be freed during scsi scan.
This is fixed in bk8, here is a snippit of part of the patch to scsi_lib.c that fixed the problem, or look at the end of scsi_prep_fn, (plus the corresponding call to blk_plug_device was removed from scsi_request_fn):
+ defer: + /* If we defer, the elv_next_request() returns NULL, but the + * queue must be restarted, so we plug here if no returning + * command will automatically do that. */ + if (sdev->device_busy == 0) + blk_plug_device(q); + return BLKPREP_DEFER; +}
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