From: Bhushan Bharat-R65777 <R65777@freescale.com>
To: Paul Mackerras <paulus@samba.org>
Cc: Alexander Graf <agraf@suse.de>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
"kvm-ppc@vger.kernel.org" <kvm-ppc@vger.kernel.org>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>
Subject: RE: [PATCH 21/23] KVM: PPC: Book3S PR: Use mmu_notifier_retry() in kvmppc_mmu_map_page()
Date: Wed, 7 Aug 2013 08:31:04 +0000 [thread overview]
Message-ID: <6A3DF150A5B70D4F9B66A25E3F7C888D070FE64A@039-SN2MPN1-012.039d.mgd.msft.net> (raw)
In-Reply-To: <20130807082751.GB12112@iris.ozlabs.ibm.com>
> -----Original Message-----
> From: Paul Mackerras [mailto:paulus@samba.org]
> Sent: Wednesday, August 07, 2013 1:58 PM
> To: Bhushan Bharat-R65777
> Cc: Alexander Graf; Benjamin Herrenschmidt; kvm-ppc@vger.kernel.org;
> kvm@vger.kernel.org
> Subject: Re: [PATCH 21/23] KVM: PPC: Book3S PR: Use mmu_notifier_retry() in
> kvmppc_mmu_map_page()
>
> On Wed, Aug 07, 2013 at 05:17:29AM +0000, Bhushan Bharat-R65777 wrote:
> >
> > Pauls, I am trying to understand the flow; does retry mean that we do not
> create the mapping and return to guest, which will fault again and then we will
> retry?
>
> Yes, and you do put_page or kvm_release_pfn_clean for any page that you got.
Ok, but what is the value to return back to guest when we know it is again going to generate fault.
Cannot we retry within KVM?
Thanks
-Bharat
>
> Paul.
WARNING: multiple messages have this Message-ID (diff)
From: Bhushan Bharat-R65777 <R65777@freescale.com>
To: Paul Mackerras <paulus@samba.org>
Cc: Alexander Graf <agraf@suse.de>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
"kvm-ppc@vger.kernel.org" <kvm-ppc@vger.kernel.org>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>
Subject: RE: [PATCH 21/23] KVM: PPC: Book3S PR: Use mmu_notifier_retry() in kvmppc_mmu_map_page()
Date: Wed, 07 Aug 2013 08:31:04 +0000 [thread overview]
Message-ID: <6A3DF150A5B70D4F9B66A25E3F7C888D070FE64A@039-SN2MPN1-012.039d.mgd.msft.net> (raw)
In-Reply-To: <20130807082751.GB12112@iris.ozlabs.ibm.com>
> -----Original Message-----
> From: Paul Mackerras [mailto:paulus@samba.org]
> Sent: Wednesday, August 07, 2013 1:58 PM
> To: Bhushan Bharat-R65777
> Cc: Alexander Graf; Benjamin Herrenschmidt; kvm-ppc@vger.kernel.org;
> kvm@vger.kernel.org
> Subject: Re: [PATCH 21/23] KVM: PPC: Book3S PR: Use mmu_notifier_retry() in
> kvmppc_mmu_map_page()
>
> On Wed, Aug 07, 2013 at 05:17:29AM +0000, Bhushan Bharat-R65777 wrote:
> >
> > Pauls, I am trying to understand the flow; does retry mean that we do not
> create the mapping and return to guest, which will fault again and then we will
> retry?
>
> Yes, and you do put_page or kvm_release_pfn_clean for any page that you got.
Ok, but what is the value to return back to guest when we know it is again going to generate fault.
Cannot we retry within KVM?
Thanks
-Bharat
>
> Paul.
next prev parent reply other threads:[~2013-08-07 8:31 UTC|newest]
Thread overview: 136+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-06 4:12 [PATCH 00/23] Allow PR and HV KVM to coexist in one kernel Paul Mackerras
2013-08-06 4:12 ` Paul Mackerras
2013-08-06 4:13 ` [PATCH 01/23] KVM: PPC: Book3S: Fix compile error in XICS emulation Paul Mackerras
2013-08-06 4:13 ` Paul Mackerras
2013-08-28 22:51 ` Alexander Graf
2013-08-28 22:51 ` Alexander Graf
2013-08-06 4:14 ` [PATCH 02/23] KVM: PPC: Book3S PR: Don't corrupt guest state when kernel uses VMX Paul Mackerras
2013-08-06 4:14 ` Paul Mackerras
2013-08-08 15:49 ` Aneesh Kumar K.V
2013-08-08 15:49 ` Aneesh Kumar K.V
2013-08-28 22:51 ` Alexander Graf
2013-08-28 22:51 ` Alexander Graf
2013-08-06 4:15 ` [PATCH 03/23] KVM: PPC: Book3S PR: Make instruction fetch fallback work for system calls Paul Mackerras
2013-08-06 4:15 ` Paul Mackerras
2013-08-28 22:51 ` Alexander Graf
2013-08-28 22:51 ` Alexander Graf
2013-08-06 4:16 ` [PATCH 04/23] KVM: PPC: Book3S PR: Keep volatile reg values in vcpu rather than shadow_vcpu Paul Mackerras
2013-08-06 4:16 ` Paul Mackerras
2013-08-11 11:06 ` Aneesh Kumar K.V
2013-08-11 11:18 ` Aneesh Kumar K.V
2013-08-28 22:00 ` Alexander Graf
2013-08-28 22:00 ` Alexander Graf
2013-08-29 5:04 ` Paul Mackerras
2013-08-29 5:04 ` Paul Mackerras
2013-08-29 12:46 ` Alexander Graf
2013-08-29 12:46 ` Alexander Graf
2013-08-06 4:18 ` [PATCH 05/23] KVM: PPC: Book3S PR: Rework kvmppc_mmu_book3s_64_xlate() Paul Mackerras
2013-08-06 4:18 ` Paul Mackerras
2013-08-28 22:51 ` Alexander Graf
2013-08-28 22:51 ` Alexander Graf
2013-08-06 4:18 ` [PATCH 06/23] KVM: PPC: Book3S PR: Allow guest to use 64k pages Paul Mackerras
2013-08-06 4:18 ` Paul Mackerras
2013-08-28 22:56 ` Alexander Graf
2013-08-28 22:56 ` Alexander Graf
2013-08-29 5:17 ` Paul Mackerras
2013-08-29 5:17 ` Paul Mackerras
2013-08-29 12:48 ` Alexander Graf
2013-08-29 12:48 ` Alexander Graf
2013-08-06 4:19 ` [PATCH 07/23] KVM: PPC: Book3S PR: Use 64k host pages where possible Paul Mackerras
2013-08-06 4:19 ` Paul Mackerras
2013-08-28 23:24 ` Alexander Graf
2013-08-28 23:24 ` Alexander Graf
2013-08-29 5:23 ` Paul Mackerras
2013-08-29 5:23 ` Paul Mackerras
2013-08-29 12:43 ` Alexander Graf
2013-08-29 12:43 ` Alexander Graf
2013-08-06 4:20 ` [PATCH 08/23] KVM: PPC: Book3S PR: Handle PP0 page-protection bit in guest HPTEs Paul Mackerras
2013-08-06 4:20 ` Paul Mackerras
2013-08-06 4:20 ` [PATCH 09/23] KVM: PPC: Book3S PR: Correct errors in H_ENTER implementation Paul Mackerras
2013-08-06 4:20 ` Paul Mackerras
2013-08-06 4:21 ` [PATCH 10/23] KVM: PPC: Book3S PR: Make HPT accesses and updates SMP-safe Paul Mackerras
2013-08-06 4:21 ` Paul Mackerras
2013-08-06 4:21 ` [PATCH 11/23] KVM: PPC: Book3S PR: Allocate kvm_vcpu structs from kvm_vcpu_cache Paul Mackerras
2013-08-06 4:21 ` Paul Mackerras
2013-08-12 10:03 ` Aneesh Kumar K.V
2013-08-12 10:15 ` Aneesh Kumar K.V
2013-08-06 4:22 ` [PATCH 12/23] KVM: PPC: Book3S HV: Better handling of exceptions that happen in real mode Paul Mackerras
2013-08-06 4:22 ` Paul Mackerras
2013-08-06 4:22 ` [PATCH 13/23] KVM: PPC: Book3S: Move skip-interrupt handlers to common code Paul Mackerras
2013-08-06 4:22 ` Paul Mackerras
2013-08-06 4:23 ` [PATCH 14/23] KVM: PPC: Book3S PR: Delay disabling relocation-on interrupts Paul Mackerras
2013-08-06 4:23 ` Paul Mackerras
2013-08-30 16:30 ` Alexander Graf
2013-08-30 16:30 ` Alexander Graf
2013-08-30 22:55 ` Paul Mackerras
2013-08-30 22:55 ` Paul Mackerras
2013-08-30 23:13 ` Alexander Graf
2013-08-30 23:13 ` Alexander Graf
2013-08-31 5:42 ` Paul Mackerras
2013-08-31 5:42 ` Paul Mackerras
2013-08-06 4:24 ` [PATCH 15/23] KVM: PPC: Book3S: Rename symbols that exist in both PR and HV KVM Paul Mackerras
2013-08-06 4:24 ` Paul Mackerras
2013-08-06 4:24 ` [PATCH 16/23] KVM: PPC: Book3S: Merge implementations of KVM_PPC_GET_SMMU_INFO ioctl Paul Mackerras
2013-08-06 4:24 ` Paul Mackerras
2013-08-06 4:25 ` [PATCH 17/23] KVM: PPC: Book3S HV: Factorize kvmppc_core_vcpu_create_hv() Paul Mackerras
2013-08-06 4:25 ` Paul Mackerras
2013-08-06 4:25 ` [PATCH 18/23] KVM: PPC: Book3S: Allow both PR and HV KVM to be selected Paul Mackerras
2013-08-06 4:25 ` Paul Mackerras
2013-08-06 4:26 ` [PATCH 19/23] KVM: PPC: Book3S: Select PR vs HV separately for each guest Paul Mackerras
2013-08-06 4:26 ` Paul Mackerras
2013-09-12 22:56 ` Alexander Graf
2013-09-12 22:56 ` Alexander Graf
2013-09-13 0:17 ` Paul Mackerras
2013-09-13 0:17 ` Paul Mackerras
2013-09-13 1:31 ` Benjamin Herrenschmidt
2013-09-13 1:31 ` Benjamin Herrenschmidt
2013-09-13 4:18 ` Alexander Graf
2013-09-13 4:18 ` Alexander Graf
2013-09-14 18:33 ` Aneesh Kumar K.V
2013-09-14 18:45 ` Aneesh Kumar K.V
2013-09-14 20:22 ` Alexander Graf
2013-09-14 20:22 ` Alexander Graf
2013-09-15 9:16 ` Aneesh Kumar K.V
2013-09-15 9:28 ` Aneesh Kumar K.V
2013-09-15 11:55 ` Alexander Graf
2013-09-15 11:55 ` Alexander Graf
2013-09-13 4:17 ` Alexander Graf
2013-09-13 4:17 ` Alexander Graf
2013-09-18 12:05 ` Paul Mackerras
2013-09-18 12:05 ` Paul Mackerras
2013-09-19 7:31 ` Alexander Graf
2013-09-19 7:31 ` Alexander Graf
2013-08-06 4:27 ` [PATCH 20/23] KVM: PPC: Book3S PR: Better handling of host-side read-only pages Paul Mackerras
2013-08-06 4:27 ` Paul Mackerras
2013-09-12 23:01 ` Alexander Graf
2013-09-12 23:01 ` Alexander Graf
2013-09-13 0:23 ` Paul Mackerras
2013-09-13 0:23 ` Paul Mackerras
2013-09-14 5:24 ` Paul Mackerras
2013-09-14 5:24 ` Paul Mackerras
2013-09-14 20:23 ` Alexander Graf
2013-09-14 20:23 ` Alexander Graf
2013-09-16 4:12 ` Paul Mackerras
2013-09-16 4:12 ` Paul Mackerras
2013-09-16 12:47 ` Alexander Graf
2013-09-16 12:47 ` Alexander Graf
2013-08-06 4:27 ` [PATCH 21/23] KVM: PPC: Book3S PR: Use mmu_notifier_retry() in kvmppc_mmu_map_page() Paul Mackerras
2013-08-06 4:27 ` Paul Mackerras
2013-08-07 4:13 ` Bhushan Bharat-R65777
2013-08-07 4:13 ` Bhushan Bharat-R65777
2013-08-07 4:28 ` Paul Mackerras
2013-08-07 4:28 ` Paul Mackerras
2013-08-07 5:18 ` Bhushan Bharat-R65777
2013-08-07 5:18 ` Bhushan Bharat-R65777
2013-08-07 5:17 ` Bhushan Bharat-R65777
2013-08-07 5:17 ` Bhushan Bharat-R65777
2013-08-07 8:27 ` Paul Mackerras
2013-08-07 8:27 ` Paul Mackerras
2013-08-07 8:31 ` Bhushan Bharat-R65777 [this message]
2013-08-07 8:31 ` Bhushan Bharat-R65777
2013-08-08 12:06 ` Paul Mackerras
2013-08-08 12:06 ` Paul Mackerras
2013-08-06 4:27 ` [PATCH 22/23] KVM: PPC: Book3S PR: Mark pages accessed, and dirty if being written Paul Mackerras
2013-08-06 4:27 ` Paul Mackerras
2013-08-06 4:28 ` [PATCH 23/23] KVM: PPC: Book3S PR: Reduce number of shadow PTEs invalidated by MMU notifiers Paul Mackerras
2013-08-06 4:28 ` Paul Mackerras
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=6A3DF150A5B70D4F9B66A25E3F7C888D070FE64A@039-SN2MPN1-012.039d.mgd.msft.net \
--to=r65777@freescale.com \
--cc=agraf@suse.de \
--cc=benh@kernel.crashing.org \
--cc=kvm-ppc@vger.kernel.org \
--cc=kvm@vger.kernel.org \
--cc=paulus@samba.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.