On Tue, Apr 21, 2009 at 06:27:56AM -0400, Jeff Garzik wrote:
> Benny Halevy wrote:
> >Hi Jeff,
> >
> >Since 2.6.29 I'm having intermittent problems with booting kernels.
> >After supposedly waiting for scsi async scan to complete,
> >quite frequently I see errors from the init resume process
> >when it fails to find the swap partition and later the root
> >file system fails to load.
> >
> >A workaround that I found to be helpful is booting the kernel
> >with scsi_mod.scan=sync so I suspect sata_nv has a problem
> >with asynchronous scanning.
>
> Personally, I think the whole system is broken, so continue to use this
> workaround until it gets fixed upstream. This sounds like some timing
> issues related to waiting for the device probe to finish, something that
> people keep breaking (witness my USB flash drive boot breakage).
No, it's 4ace92fc112c6069b4fcb95a31d3142d4a43ff2a.
Specifically, this bit:
@@ -179,6 +180,8 @@ int scsi_complete_async_scans(void)
spin_unlock(&async_scan_lock);
kfree(data);
+ /* Synchronize async operations globally */
+ async_synchronize_full();
return 0;
}
Vegard Nossum has a patch that seems to have been ignored:
http://marc.info/?l=linux-kernel&m=123920746830420&w=2
--
Matthew Wilcox Intel Open Source Technology Centre
"Bill, look, we understand that you're interested in selling us this
operating system, but compare it to ours. We can't possibly take such
a retrograde step."
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