From owner-freebsd-scsi  Wed Feb 26 20:32:14 2003
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Date: Thu, 27 Feb 2003 13:31:57 +0900
Message-ID: <ybsk7fml4xu.wl@ett.sat.t.u-tokyo.ac.jp>
From: Hidetoshi Shimokawa <simokawa@sat.t.u-tokyo.ac.jp>
To: non@ever.sanda.gr.jp
Cc: freebsd-scsi@freebsd.org
Subject: Re: call scan_bus in interrupt context.
In-Reply-To: <20030226130721S.non@ever.sanda.gr.jp>
References: <ybsu1erlna9.wl@ett.sat.t.u-tokyo.ac.jp>
	<20030226130721S.non@ever.sanda.gr.jp>
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At Wed, 26 Feb 2003 13:07:21 +0900,
non@ever.sanda.gr.jp wrote:
> 
> From: Hidetoshi Shimokawa <simokawa@sat.t.u-tokyo.ac.jp>
> Date: Wed, 26 Feb 2003 12:43:26 +0900
> > I have a question about XPT_SCAN_BUS in CAM.
> > I need to initiate a bus scan from a interrupt context but xpt_alloc_ccb()
> > failed because it calls malloc with M_WAITOK.
> > (kernel panics if you compile it with INVARIANTS in 4-stable)
> 
> Does scsi_low_rescan_bus_cam() in sys/cam/scsi/scsi_low.c help ?

This is almost same as I did except I used M_NOWAIT flags for
malloc(). XPT_SCAN_BUS cannot be used in an interrupt context.

Anyway, I implemented scan_target function using XPT_SCAN_LUN which
can be used in an interrupt context. It's ok for now.

/\ Hidetoshi Shimokawa
\/  simokawa@sat.t.u-tokyo.ac.jp
PGP public key: http://www.sat.t.u-tokyo.ac.jp/~simokawa/pgp.html


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