[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [PATCH RFC 0/6] x86/ioapic: fix edge triggered interrupt migration
- To: Jan Beulich <jbeulich@xxxxxxxx>
- From: Roger Pau Monné <roger.pau@xxxxxxxxxx>
- Date: Fri, 20 May 2022 15:41:15 +0200
- Arc-authentication-results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=citrix.com; dmarc=pass action=none header.from=citrix.com; dkim=pass header.d=citrix.com; arc=none
- Arc-message-signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=ofld6Ep71YeyYxHfidBH/b9x2bm3x7TqyRzarWNNHVI=; b=XCRcZgLVd8T1DF9/Q0QrZ5f0UT7Q6noG16xWw/PdIGHIDi6u1rQGnvXkL3l/v0vHx1nJi+Tc+8gBPxjsKxDRWfV4mCEUqflIGRSeAdIgGYd86V8O1WPEC4ln2/6zuzdePYcBsvZDxGTPe2qoNgkqAwRREaA7u3zdpp/XOGig3arZFB8qsBmHRt8BpLNgv2I2GCFjav6lF3rSuVPd0GxVtCYSCyT8nUEguIBG/0zNoSkOS17YutGyJXbiOkCVILeCOmeBKm5KmGxM+8LgLwQJuVdR1JVHoX1B+/PZAOE6TVj6PNDxIn5eX5jvAmiUI6nQjzSVWArR0DmoHQvwJY9WVg==
- Arc-seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=AePKWpQlJiee916ViM5cIDIv3bUV+ET2OFsXEvmdR56L7dUlM6nx+PCC4rPxei1u5/dXMMwNFLUVS8vLIPYW9WQ5dDiSKJIZj+BVUg4XT3njlWo4gAqkwN3esNbWtzMUJwZVrhpxoo9WsazG04XlDGRFj579R5C7gFfpGrYzVEvsOiEHT2WSE2wYay0CvLi3ZtD0mVeiyPj4rjCfRdfeb9lIBhf7d2irOlrLxmIwobZ27KDk++DnZGnPCKfrozMlmKWANGpPdAiuLMdDQzzfm3Yurpf/uULTDxQFe5xyZu3ykcpJLZOUxvr40EYFRLbwH0FcO5Dj0AtuUVnKrslAZQ==
- Authentication-results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=citrix.com;
- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Kevin Tian <kevin.tian@xxxxxxxxx>, Paul Durrant <paul@xxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Fri, 20 May 2022 13:41:28 +0000
- Ironport-data: A9a23:/6uvoayUvsrbTiDuKEZ6t+cnxyrEfRIJ4+MujC+fZmUNrF6WrkUGn zAZWmqGOfeJMzOheIsnYIji/BhT7ZfdyoJkHAZuriAxQypGp/SeCIXCJC8cHc8zwu4v7q5Dx 59DAjUVBJlsFhcwnj/0bv656yMUOZigHtIQMsadUsxKbVIiGX5JZS5LwbZj2NY124DhWmthh PupyyHhEA79s9JLGjp8B5Kr8HuDa9yr5Vv0FnRnDRx6lAe2e0s9VfrzFonoR5fMeaFGH/bSe gr25OrRElU1XfsaIojNfr7TKiXmS1NJVOSEoiI+t6OK2nCuqsGuu0qS2TV1hUp/0l20c95NJ Nplv42fSCIxJqzwnv07ejVeGgRxD6JEweqSSZS/mZT7I0zuVVLJmqwrJ2ZveIoS96BwHH1E8 uEeJHYVdBefiumqwbW9DO5xmsAkK8qtN4Qa0p1i5WiBUbB6HtaeHeOTuoEwMDQY36iiGd7EY MUUc3x3ZQnoaBxTIFYHTpk5mY9Eg1GgKmII+ALK/8Lb5UD/1g5q3ofxaeHJa9ikSNkShE2lj F7vqjGR7hYycYb3JSC+2nCmi/LLnCj7cJkPD7D+/flv6HWMwkQDBRtQUkG0ydG6h1C/XZRDK kUS0isosaU2skesS7HVRxSlpFaUsxhaXMBfe8Uq5QfIxqfK7gKxAmkfUiUHeNEgrNUxRzEhy hmOhdyBONB0mLicSHbY/bDNqzq3YHERNTVbOnFCShYZ6d7+po11lgjIUttoDK+yiJvyBC30x DeJ6iM5gt3/kPI26klyxnif6xrEm3QDZlddCtn/No590j5EWQ==
- Ironport-hdrordr: A9a23:avSvs6jmi09on3hdLTpTKechsnBQX0h13DAbv31ZSRFFG/FwyP rCoB1L73XJYWgqM03I+eruBEBPewK/yXcT2/hqAV7CZnichILMFu1fBOTZslnd8kHFltK1kJ 0QCpSWa+eAcmSS8/yKhzVQeuxIqLfnzEnrv5an854Ed3AXV0gK1XYdNu/0KDwUeOEQbqBJaa Z0q/A37gaISDAyVICWF3MFV+/Mq5nik4/nWwcPA1oC5BOVhT2lxbbmG1zAty1uGA9n8PMHyy zoggb57qKsv7WSzQLd7Xba69BzlMH6wtVOKcSQgow+KynqiCyveIN9Mofy9AwdkaWK0hIHgd PMqxAvM4Ba7G7QRHi8pV/X1wzpwF8Vmgvf4G7dpUGmjd3yRTo8BcYEr5leaAHl500pu8w5+L 5X3kqC3qAnQi/orWDY3ZzlRhtqnk27rT4JiugIlUFSVoMYdft4sZEfxkVIC50NdRiKpLzPKN MeTf002cwmMW9zNxvizypSKZ2XLzkO9y69MwY/Upf/6UkVoJh7p3FosfD30E1wsa7VcKM0lt gsAp4Y6o2mcfVmHZ6VfN1xJ/dfKla9Ni4kY1jiV2gOKsk8SgHwgq+yxokJz8eXX7FN5KcOuf 36ISFlXCgJCgjTNfE=
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On Fri, May 20, 2022 at 02:46:39PM +0200, Jan Beulich wrote:
> On 20.05.2022 14:36, Roger Pau Monné wrote:
> > On Thu, Apr 21, 2022 at 03:21:08PM +0200, Roger Pau Monne wrote:
> >> Hello,
> >>
> >> Following series attempts to solve the issue with IO-APIC edge triggered
> >> interrupts seeing an inconsistent RTE or IRTE when injected while being
> >> migrated.
> >>
> >> It's currently RFC because some patches have post commit message notes,
> >> and because I'm not sure if patch 1 is really needed. I originally had
> >> the idea of suggesting to only backport patch 1 in order to fix the
> >> issue in older releases, while leaving the more complex (and thus
> >> error prone) IOMMU changes in unstable. Note however that patch 1 is
> >> just a workaround to prevent interrupts seeing inconsistent entries
> >> while being updated, masking the entry just makes the warning go away,
> >> but the interrupt will be lost.
> >
> > Ping?
>
> Sorry, the usual thing with RFCs: They take lower priority than other
> work items. This series is certainly the first of the several pending
> RFC series which I mean to get to, but it's hard to predict when this
> would be.
No problem, I don't think it's a super urgent issue: we have always
handled interrupts this way and so far got no noticeable issues (apart
from the log messages reported on the console).
There's a non-trivial amount of IOMMU code changes, so maybe the IOMMU
maintainers could take a stab at those as a start?
Thanks, Roger.
|
