From: Linus Torvalds <torvalds@linux-foundation.org>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
LKML <linux-kernel@vger.kernel.org>, Ingo Molnar <mingo@elte.hu>,
Thomas Gleixner <tglx@linutronix.de>,
Christoph Hellwig <hch@infradead.org>, Andi Kleen <ak@suse.de>
Subject: Re: [PATCH] enable interrupts in user path of page fault.
Date: Thu, 7 Jun 2007 19:29:35 -0700 (PDT) [thread overview]
Message-ID: <alpine.LFD.0.98.0706071928140.4205@woody.linux-foundation.org> (raw)
In-Reply-To: <1181268406.10408.26.camel@localhost.localdomain>
On Thu, 7 Jun 2007, Steven Rostedt wrote:
>
> I didn't realize that userspace was allowed to run with interrupts
> disabled.
It isn't, normally. You *can* try to do it by using iopl(), but it's not
practical. It's certainly not practical to expect a page fault to not
enable them again, since we obviously need interrupts enabled just to
handle any IO.
So don't worry about it.
Linus
next prev parent reply other threads:[~2007-06-08 2:30 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-07 3:34 Steven Rostedt
2007-06-08 1:58 ` Andrew Morton
2007-06-08 2:06 ` Steven Rostedt
2007-06-08 2:29 ` Linus Torvalds [this message]
2007-06-08 2:28 ` Linus Torvalds
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