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Re: kern/47097: ahcisata(4) triggers panic when disk I/O error is caused
The following reply was made to PR kern/47097; it has been noted by GNATS.
From: "T.SHIOZAKI" <tshiozak%bsdclub.org@localhost>
Cc: gnats-bugs%NetBSD.org@localhost, kern-bug-people%NetBSD.org@localhost,
Subject: Re: kern/47097: ahcisata(4) triggers panic when disk I/O error is
Date: Thu, 25 Oct 2012 06:41:06 +0900 (JST)
> On Sat, Oct 20, 2012 at 03:50:00PM +0000, tshiozak%bsdclub.org@localhost
> > when disk I/O error is caused, ahcisata(4) seems to call tsleep() under
> > interrupt context and it triggers panic.
> > call trace is here:
> > vpanic
> > kern_assert
> > callout_halt
> > sleepq_block
> > ahci_do_reset_drive
> > ahci_reset_drive
> > wddone
> > ahci_bio_complete
> > ahci_intr_port
> > ahci_intr
> The attached patch should work around it. But this is going to
> delay() for half a second, which is bad. Something better is needed,
> so we can reset the drive from the atabus thread.
I confirmed that the patch fixes the problem. Thanks.
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