linux-kernel - Re: [PATCH 3.12-rc7] KVM: Fix modprobe failure for kvm_intel/kvm

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Message-ID: <52710FC8.8060309@linux.vnet.ibm.com>
Date:	Wed, 30 Oct 2013 19:25:20 +0530
From:	Raghavendra K T <raghavendra.kt@...ux.vnet.ibm.com>
To:	Greg KH <gregkh@...uxfoundation.org>
CC:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Tim Gardner <tim.gardner@...onical.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	the arch/x86 maintainers <x86@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, Gleb Natapov <gleb@...hat.com>,
	Marcelo Tosatti <mtosatti@...hat.com>,
	Paolo Bonzini <pbonzini@...hat.com>,
	KVM list <kvm@...r.kernel.org>,
	Al Viro <viro@...iv.linux.org.uk>
Subject: Re: [PATCH 3.12-rc7] KVM: Fix modprobe failure for kvm_intel/kvm_amd

On 10/30/2013 01:30 AM, Greg KH wrote:
[...]
>> debugfs_create_dir() currently returns NULL dentry on both
>> EEXIST, ENOMEM ... cases.
>>
>> Could one solution be cascading actual error
>> that is lost in fs/debugfs/inode.c:__create_file(), so that we could
>> take correct action in case of failure of debugfs_create_dir()?
>
> What would you do here?  You shouldn't really care about debugfs files,
> if there's an error, keep on going, no code path should really care,
> right?
>
Thanks Greg.

Yes you are right. we can't do anything useful after that error.

If debugfs directories are not critical, may be we could
continue from there.

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