From: Walther Maldonado <walther.maldonado@unine.ch>
To: <kvm@vger.kernel.org>
Subject: BUG Report: "config KVM" selects PREEMPT_NOTIFIERS, but it should also select PREEMPT (Vanilla Kernel 2.6.30)
Date: Mon, 29 Jun 2009 17:18:55 +0200 [thread overview]
Message-ID: <20090629171855.2820e75a@Xellex> (raw)
Good day,
Today when attempting to compile and install the KVM module (kernel 2.6.30), inserting the module would error with a number of unresolved symbols such as preempt_notifier_register() not found.
Some code-browsing revealed that, even though the kvm KConfig setting "KVM" does select PREEMPT_NOTIFIERS, in include/linux/preempt.h, said define will not cause the expected functions to be defined unless CONFIG_PREEMPT is also selected.
But I don't have CONFIG_PREEMPT (Preemptible Kernel), my kernel was configured with CONFIG_PREEMPT_VOLUNTARY (Voluntary Kernel Preemption). Since the define CONFIG_PREEMPT_NOTIFIERS is used in other files other than preempt.h, the bug might be in KVM's Kconfig file (in my case, arch/x86/kConfig) not selecting/depending on the right config parameters.
Cheers,
Walther
PS: If there is a need to reply, please do so directly as I am not subscribed to the mailing list.
next reply other threads:[~2009-06-29 23:09 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-29 15:18 Walther Maldonado [this message]
2009-07-01 9:41 ` BUG Report: "config KVM" selects PREEMPT_NOTIFIERS, but it should also select PREEMPT (Vanilla Kernel 2.6.30) Avi Kivity
2009-07-01 13:29 ` Walther Maldonado
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