From: Paul Mackerras <paulus@samba.org>
To: Alexander Graf <agraf@suse.de>
Cc: kvm-ppc@vger.kernel.org, KVM list <kvm@vger.kernel.org>,
kvmarm@lists.cs.columbia.edu
Subject: Re: [PATCH 6/8] KVM: PPC: E500: Implement MMU notifiers
Date: Wed, 08 Aug 2012 03:31:22 +0000 [thread overview]
Message-ID: <20120808033122.GA7794@drongo> (raw)
In-Reply-To: <1344337036-22244-7-git-send-email-agraf@suse.de>
On Tue, Aug 07, 2012 at 12:57:14PM +0200, Alexander Graf wrote:
> The e500 target has lived without mmu notifiers ever since it got
> introduced, but fails for the user space check on them with hugetlbfs.
Ironically that user space check isn't necessary any more since David
Gibson's fix for the hugetlbfs bug went in (90481622, "hugepages: fix
use after free bug in "quota" handling"). So on sufficiently recent
kernels you can just remove the userspace check. Implementing
mmu-notifiers is a good thing for other reasons though.
Paul.
WARNING: multiple messages have this Message-ID (diff)
From: Paul Mackerras <paulus@samba.org>
To: Alexander Graf <agraf@suse.de>
Cc: kvm-ppc@vger.kernel.org, KVM list <kvm@vger.kernel.org>,
kvmarm@lists.cs.columbia.edu
Subject: Re: [PATCH 6/8] KVM: PPC: E500: Implement MMU notifiers
Date: Wed, 8 Aug 2012 13:31:22 +1000 [thread overview]
Message-ID: <20120808033122.GA7794@drongo> (raw)
In-Reply-To: <1344337036-22244-7-git-send-email-agraf@suse.de>
On Tue, Aug 07, 2012 at 12:57:14PM +0200, Alexander Graf wrote:
> The e500 target has lived without mmu notifiers ever since it got
> introduced, but fails for the user space check on them with hugetlbfs.
Ironically that user space check isn't necessary any more since David
Gibson's fix for the hugetlbfs bug went in (90481622, "hugepages: fix
use after free bug in "quota" handling"). So on sufficiently recent
kernels you can just remove the userspace check. Implementing
mmu-notifiers is a good thing for other reasons though.
Paul.
next prev parent reply other threads:[~2012-08-08 3:31 UTC|newest]
Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-07 10:57 [PATCH 0/8] KVM: PPC: E500: Implement MMU Notifiers Alexander Graf
2012-08-07 10:57 ` Alexander Graf
2012-08-07 10:57 ` [PATCH 1/8] KVM: PPC: BookE: Expose remote TLB flushes in debugfs Alexander Graf
2012-08-07 10:57 ` Alexander Graf
2012-08-07 10:57 ` [PATCH 2/8] KVM: PPC: E500: Fix clear_tlb_refs Alexander Graf
2012-08-07 10:57 ` Alexander Graf
2012-08-07 10:57 ` [PATCH 3/8] KVM: PPC: PR: Use generic tracepoint for guest exit Alexander Graf
2012-08-07 10:57 ` Alexander Graf
2012-08-07 10:57 ` [PATCH 4/8] KVM: PPC: Expose SYNC cap based on mmu notifiers Alexander Graf
2012-08-07 10:57 ` Alexander Graf
2012-08-07 10:57 ` [PATCH 5/8] KVM: Add hva_to_memslot Alexander Graf
2012-08-07 10:57 ` Alexander Graf
2012-08-08 4:55 ` [kvmarm] " Christoffer Dall
2012-08-08 4:55 ` Christoffer Dall
2012-08-08 17:30 ` Alexander Graf
2012-08-08 17:30 ` Alexander Graf
2012-08-09 10:34 ` Takuya Yoshikawa
2012-08-09 10:34 ` Takuya Yoshikawa
2012-08-09 10:36 ` Avi Kivity
2012-08-09 10:36 ` Avi Kivity
2012-08-09 17:02 ` Alexander Graf
2012-08-09 17:02 ` Alexander Graf
2012-08-12 9:24 ` Avi Kivity
2012-08-12 9:24 ` Avi Kivity
2012-08-12 11:03 ` Alexander Graf
2012-08-12 11:03 ` Alexander Graf
2012-08-12 11:21 ` Avi Kivity
2012-08-12 11:21 ` Avi Kivity
2012-08-12 12:47 ` Alexander Graf
2012-08-12 12:47 ` Alexander Graf
2012-08-07 10:57 ` [PATCH 6/8] KVM: PPC: E500: Implement MMU notifiers Alexander Graf
2012-08-07 10:57 ` Alexander Graf
2012-08-07 13:30 ` Avi Kivity
2012-08-07 13:30 ` Avi Kivity
2012-08-07 13:52 ` Alexander Graf
2012-08-07 13:52 ` Alexander Graf
2012-08-07 14:14 ` Avi Kivity
2012-08-07 14:14 ` Avi Kivity
2012-08-07 14:24 ` Alexander Graf
2012-08-07 14:24 ` Alexander Graf
2012-08-08 3:31 ` Paul Mackerras [this message]
2012-08-08 3:31 ` Paul Mackerras
2012-08-08 8:03 ` Alexander Graf
2012-08-08 8:03 ` Alexander Graf
2012-08-07 10:57 ` [PATCH 7/8] KVM: Add page map arch callback Alexander Graf
2012-08-07 10:57 ` Alexander Graf
2012-08-07 13:32 ` Avi Kivity
2012-08-07 13:32 ` Avi Kivity
2012-08-07 13:44 ` Alexander Graf
2012-08-07 13:44 ` Alexander Graf
2012-08-07 13:58 ` Avi Kivity
2012-08-07 13:58 ` Avi Kivity
2012-08-07 14:08 ` Alexander Graf
2012-08-07 14:08 ` Alexander Graf
2012-08-07 14:10 ` Avi Kivity
2012-08-07 14:10 ` Avi Kivity
2012-08-07 14:14 ` Alexander Graf
2012-08-07 14:14 ` Alexander Graf
2012-08-07 14:20 ` Avi Kivity
2012-08-07 14:20 ` Avi Kivity
2012-08-07 14:24 ` Alexander Graf
2012-08-07 14:24 ` Alexander Graf
2012-08-07 14:31 ` Avi Kivity
2012-08-07 14:31 ` Avi Kivity
2012-08-07 10:57 ` [PATCH 8/8] KVM: PPC: Add cache flush on page map Alexander Graf
2012-08-07 10:57 ` Alexander Graf
2012-08-07 21:01 ` Scott Wood
2012-08-07 21:01 ` Scott Wood
2012-08-08 7:59 ` Alexander Graf
2012-08-08 7:59 ` Alexander Graf
2012-08-08 17:31 ` [PATCH 0/8] KVM: PPC: E500: Implement MMU Notifiers Alexander Graf
2012-08-08 17:31 ` Alexander Graf
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