From: Charles Forsyth <forsyth@terzarima.net>
To: 9fans@9fans.net
Subject: Re: [9fans] kenfs question?
Date: Sun, 7 Feb 2010 10:42:10 +0000 [thread overview]
Message-ID: <7d9191a1033cef725ecab7ffc88d1d01@terzarima.net> (raw)
In-Reply-To: <e75ecaade32da4958c9e9795f314ddeb@brasstown.quanstro.net>
> I guess I wasn't clear; what I was asking was why it was safe to
> attempt to take a lock when splhi() at all.
because such a lock is always taken with splhi, using ilock.
you might find in older code the use of lock in interrupt handlers,
protected by the implicit splhi of interrupt handling, and in
a few cases explicit splhi calls before lock.
next prev parent reply other threads:[~2010-02-07 10:42 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-06 16:12 Venkatesh Srinivas
2010-02-06 16:16 ` erik quanstrom
2010-02-11 13:31 ` Venkatesh Srinivas
2010-02-11 14:55 ` erik quanstrom
2010-02-07 0:12 ` Russ Cox
2010-02-07 3:02 ` Venkatesh Srinivas
2010-02-07 4:44 ` erik quanstrom
2010-02-07 10:42 ` Charles Forsyth [this message]
2010-02-07 12:19 ` Venkatesh Srinivas
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