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Re: [Xen-devel] [PATCH RFC v1 07/12] staging: kpc2000: Prepare transfer_complete_cb() for PG_reserved changes
- To: David Hildenbrand <david@xxxxxxxxxx>, "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>
- From: Matt Sickler <Matt.Sickler@xxxxxxxxxxxxxx>
- Date: Tue, 22 Oct 2019 17:55:54 +0000
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- Cc: Kate Stewart <kstewart@xxxxxxxxxxxxxxxxxxx>, Sasha Levin <sashal@xxxxxxxxxx>, "linux-hyperv@xxxxxxxxxxxxxxx" <linux-hyperv@xxxxxxxxxxxxxxx>, Michal Hocko <mhocko@xxxxxxxx>, Radim Krčmář <rkrcmar@xxxxxxxxxx>, "kvm@xxxxxxxxxxxxxxx" <kvm@xxxxxxxxxxxxxxx>, Pavel Tatashin <pavel.tatashin@xxxxxxxxxxxxx>, KarimAllah Ahmed <karahmed@xxxxxxxxx>, Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>, Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>, Alexander Duyck <alexander.duyck@xxxxxxxxx>, Michal Hocko <mhocko@xxxxxxxxxx>, Paul Mackerras <paulus@xxxxxxxxxx>, "linux-mm@xxxxxxxxx" <linux-mm@xxxxxxxxx>, Paul Mackerras <paulus@xxxxxxxxx>, Michael Ellerman <mpe@xxxxxxxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>, Wanpeng Li <wanpengli@xxxxxxxxxxx>, Alexander Duyck <alexander.h.duyck@xxxxxxxxxxxxxxx>, "K. Y. Srinivasan" <kys@xxxxxxxxxxxxx>, Fabio Estevam <festevam@xxxxxxxxx>, Ben Chan <benchan@xxxxxxxxxxxx>, Kees Cook <keescook@xxxxxxxxxxxx>, "devel@xxxxxxxxxxxxxxxxxxxx" <devel@xxxxxxxxxxxxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Stephen Hemminger <sthemmin@xxxxxxxxxxxxx>, "Aneesh Kumar K.V" <aneesh.kumar@xxxxxxxxxxxxx>, Joerg Roedel <joro@xxxxxxxxxx>, "x86@xxxxxxxxxx" <x86@xxxxxxxxxx>, YueHaibing <yuehaibing@xxxxxxxxxx>, Mike Rapoport <rppt@xxxxxxxxxxxxx>, Madhumitha Prabakaran <madhumithabiw@xxxxxxxxx>, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Vlastimil Babka <vbabka@xxxxxxx>, Nishka Dasgupta <nishkadg.linux@xxxxxxxxx>, Anthony Yznaga <anthony.yznaga@xxxxxxxxxx>, Oscar Salvador <osalvador@xxxxxxx>, Dan Carpenter <dan.carpenter@xxxxxxxxxx>, "Isaac J. Manjarres" <isaacm@xxxxxxxxxxxxxx>, Juergen Gross <jgross@xxxxxxxx>, Anshuman Khandual <anshuman.khandual@xxxxxxx>, Haiyang Zhang <haiyangz@xxxxxxxxxxxxx>, Simon Sandström <simon@xxxxxxxxxx>, Dan Williams <dan.j.williams@xxxxxxxxx>, "kvm-ppc@xxxxxxxxxxxxxxx" <kvm-ppc@xxxxxxxxxxxxxxx>, Qian Cai <cai@xxxxxx>, Alex Williamson <alex.williamson@xxxxxxxxxx>, Mike Rapoport <rppt@xxxxxxxxxxxxxxxxxx>, Borislav Petkov <bp@xxxxxxxxx>, Nicholas Piggin <npiggin@xxxxxxxxx>, Andy Lutomirski <luto@xxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>, Todd Poynor <toddpoynor@xxxxxxxxxx>, Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>, Allison Randal <allison@xxxxxxxxxxx>, Jim Mattson <jmattson@xxxxxxxxxx>, Christophe Leroy <christophe.leroy@xxxxxx>, Vandana BN <bnvandana@xxxxxxxxx>, Jeremy Sowden <jeremy@xxxxxxxxxx>, Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>, Cornelia Huck <cohuck@xxxxxxxxxx>, Pavel Tatashin <pasha.tatashin@xxxxxxxxxx>, Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>, Sean Christopherson <sean.j.christopherson@xxxxxxxxx>, Rob Springer <rspringer@xxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Johannes Weiner <hannes@xxxxxxxxxxx>, Paolo Bonzini <pbonzini@xxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, "linuxppc-dev@xxxxxxxxxxxxxxxx" <linuxppc-dev@xxxxxxxxxxxxxxxx>
- Delivery-date: Wed, 23 Oct 2019 06:39:58 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Thread-index: AQHViPxcbvM0mySGyk+6f2twxm2iBqdm8Y8g
- Thread-topic: [PATCH RFC v1 07/12] staging: kpc2000: Prepare transfer_complete_cb() for PG_reserved changes
>Right now, ZONE_DEVICE memory is always set PG_reserved. We want to change
>that.
>
>The pages are obtained via get_user_pages_fast(). I assume, these could be
>ZONE_DEVICE pages. Let's just exclude them as well explicitly.
I'm not sure what ZONE_DEVICE pages are, but these pages are normal system RAM,
typically HugePages (but not always).
>
>Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
>Cc: Vandana BN <bnvandana@xxxxxxxxx>
>Cc: "Simon Sandström" <simon@xxxxxxxxxx>
>Cc: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
>Cc: Nishka Dasgupta <nishkadg.linux@xxxxxxxxx>
>Cc: Madhumitha Prabakaran <madhumithabiw@xxxxxxxxx>
>Cc: Fabio Estevam <festevam@xxxxxxxxx>
>Cc: Matt Sickler <Matt.Sickler@xxxxxxxxxxxxxx>
>Cc: Jeremy Sowden <jeremy@xxxxxxxxxx>
>Signed-off-by: David Hildenbrand <david@xxxxxxxxxx>
>---
> drivers/staging/kpc2000/kpc_dma/fileops.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
>diff --git a/drivers/staging/kpc2000/kpc_dma/fileops.c
>b/drivers/staging/kpc2000/kpc_dma/fileops.c
>index cb52bd9a6d2f..457adcc81fe6 100644
>--- a/drivers/staging/kpc2000/kpc_dma/fileops.c
>+++ b/drivers/staging/kpc2000/kpc_dma/fileops.c
>@@ -212,7 +212,8 @@ void transfer_complete_cb(struct aio_cb_data *acd, size_t
>xfr_count, u32 flags)
> BUG_ON(acd->ldev->pldev == NULL);
>
> for (i = 0 ; i < acd->page_count ; i++) {
>- if (!PageReserved(acd->user_pages[i])) {
>+ if (!PageReserved(acd->user_pages[i]) &&
>+ !is_zone_device_page(acd->user_pages[i])) {
> set_page_dirty(acd->user_pages[i]);
> }
> }
>--
>2.21.0
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