On Mon, Mar 12, 2018 at 11:14:47PM -0700, John Hubbard wrote:
> Yes, on NVIDIA GPUs, the Host/FIFO unit is limited to 40-bit addresses, so
> things such as the following need to be below (1 << 40), and also accessible
> to both CPU (user space) and GPU hardware.
> -- command buffers (CPU
On Fri, May 08, 2020 at 12:20:03PM -0700, Ralph Campbell wrote:
> hmm_range_fault() returns an array of page frame numbers and flags for
> how the pages are mapped in the requested process' page tables. The PFN
> can be used to get the struct page with hmm_pfn_to_page() and the page size
> order
On Fri, May 08, 2020 at 01:17:55PM -0700, Ralph Campbell wrote:
> On 5/8/20 12:59 PM, Matthew Wilcox wrote:
> > On Fri, May 08, 2020 at 12:20:03PM -0700, Ralph Campbell wrote:
> > > hmm_range_fault() returns an array of page frame numbers and flags for
> > &g
On Mon, Sep 14, 2020 at 04:44:16PM +0200, Christoph Hellwig wrote:
> I'm still a little unsure about the API naming, as alloc_pages sort of
> implies a struct page return value, but we return a kernel virtual
> address.
Erm ... dma_alloc_pages() returns a struct page, so is this sentence
stale?
On Mon, Sep 14, 2020 at 04:44:27PM +0200, Christoph Hellwig wrote:
> drivers/net/ethernet/i825xx/lasi_82596.c | 25 ++---
> drivers/net/ethernet/i825xx/lib82596.c | 114 ++-
> drivers/net/ethernet/i825xx/sni_82596.c | 4 -
> drivers/net/ethernet/seeq/sgiseeq.c | 28
On Tue, Sep 01, 2020 at 06:41:12PM +0200, Helge Deller wrote:
> > I still have a zoo of machines running for such testing, including a
> > 715/64 and two 730.
> > I'm going to test this git tree on the 715/64:
The 715/64 is a 7100LC machine though. I think you need to boot on
the 730 to test the
On Tue, Sep 01, 2020 at 07:52:40AM -0700, James Bottomley wrote:
> I think this looks mostly OK, except for one misnamed parameter below.
> Unfortunately, the last non-coherent parisc was the 700 series and I no
> longer own a box, so I can't test that part of it (I can fire up the
> C360 to test
gt; What about MEMORY_DEVICE_GENERIC and MEMORY_DEVICE_PCI_P2PDMA use cases?
> Where should they icrement/decrement the page reference count?
> I don't know enough about how these are used to really know what to
> do at this point. If people want me to continue to work on this series,
>
On Sat, Oct 17, 2020 at 09:09:28AM -0700, t...@redhat.com wrote:
> clang has a number of useful, new warnings see
> https://urldefense.com/v3/__https://clang.llvm.org/docs/DiagnosticsReference.html__;!!GqivPVa7Brio!Krxz78O3RKcB9JBMVo_F98FupVhj_jxX60ddN6tKGEbv_cnooXc1nnBmchm-e_O9ieGnyQ$
>
Please
On Sun, Oct 18, 2020 at 12:13:35PM -0700, James Bottomley wrote:
> On Sun, 2020-10-18 at 19:59 +0100, Matthew Wilcox wrote:
> > On Sat, Oct 17, 2020 at 09:09:28AM -0700, t...@redhat.com wrote:
> > > clang has a number of useful, new warnings see
> > > https:
On Tue, Jun 30, 2020 at 12:57:34PM -0700, Ralph Campbell wrote:
> hmm_range_fault() returns an array of page frame numbers and flags for
> how the pages are mapped in the requested process' page tables. The PFN
> can be used to get the struct page with hmm_pfn_to_page() and the page
> size order
On Thu, Nov 05, 2020 at 04:51:42PM -0800, Ralph Campbell wrote:
> Add a helper function to allow device drivers to create device private
> transparent huge pages. This is intended to help support device private
> THP migrations.
I think you'd be better off with these calling conventions:
-void
On Thu, Oct 01, 2020 at 11:17:13AM -0700, Ralph Campbell wrote:
> This is still an RFC because after looking at the pmem/dax code some
> more, I realized that the ZONE_DEVICE struct pages are being inserted
> into the process' page tables with vmf_insert_mixed() and a zero
> refcount on the
On Tue, Mar 09, 2021 at 11:14:58PM +1100, Alistair Popple wrote:
> -static inline struct page *migration_entry_to_page(swp_entry_t entry)
> -{
> - struct page *p = pfn_to_page(swp_offset(entry));
> - /*
> - * Any use of migration entries may only occur while the
> - *
On Mon, Feb 28, 2022 at 12:37:15PM -0800, Linus Torvalds wrote:
> On Mon, Feb 28, 2022 at 12:16 PM Matthew Wilcox wrote:
> >
> > Then we can never use -Wshadow ;-( I'd love to be able to turn it on;
> > it catches real bugs.
>
> Oh, we already can never use -Wshado
On Mon, Feb 28, 2022 at 12:10:24PM -0800, Linus Torvalds wrote:
> We can do
>
> typeof(pos) pos
>
> in the 'for ()' loop, and never use __iter at all.
>
> That means that inside the for-loop, we use a _different_ 'pos' than outside.
Then we can never use -Wshadow ;-( I'd love to be
a look at the rest of cleaning this up soon.
>From 28ffe35d56223d4242b915832299e5acc926737e Mon Sep 17 00:00:00 2001
From: "Matthew Wilcox (Oracle)"
Date: Tue, 1 Mar 2022 13:47:07 -0500
Subject: [PATCH] wait: Parameterize the return variable to ___wait_event()
Macros should not refer
On Wed, Feb 22, 2023 at 05:11:34PM +0100, Danilo Krummrich wrote:
> On 2/21/23 19:31, Matthew Wilcox wrote:
> > on tue, feb 21, 2023 at 03:37:49pm +0100, danilo krummrich wrote:
> > > It feels a bit weird that I, as a user of the API, would need to lock
> > > c
On Mon, Feb 20, 2023 at 03:00:59PM +0100, Danilo Krummrich wrote:
> On 2/17/23 20:38, Matthew Wilcox wrote:
> > On Fri, Feb 17, 2023 at 02:44:10PM +0100, Danilo Krummrich wrote:
> > > Generic components making use of the maple tree (such as the
> > > DRM GPUVA Manager)
On Mon, Feb 20, 2023 at 06:06:03PM +0100, Danilo Krummrich wrote:
> On 2/20/23 16:10, Matthew Wilcox wrote:
> > This is why we like people to use the spinlock embedded in the tree.
> > There's nothing for the user to care about. If the access really is
> > serialised
On Tue, Feb 21, 2023 at 03:37:49PM +0100, Danilo Krummrich wrote:
> On Mon, Feb 20, 2023 at 08:33:35PM +0000, Matthew Wilcox wrote:
> > On Mon, Feb 20, 2023 at 06:06:03PM +0100, Danilo Krummrich wrote:
> > > On 2/20/23 16:10, Matthew Wilcox wrote:
> > > > Thi
On Mon, Feb 27, 2023 at 06:39:33PM +0100, Danilo Krummrich wrote:
> On 2/21/23 19:31, Matthew Wilcox wrote:
> > Lockdep will shout at you if you get it wrong ;-) But you can safely
> > take the spinlock before calling mas_store_gfp(GFP_KERNEL) because
> > mas_nomem() knows to
On Fri, Feb 17, 2023 at 02:44:10PM +0100, Danilo Krummrich wrote:
> Generic components making use of the maple tree (such as the
> DRM GPUVA Manager) delegate the responsibility of ensuring mutual
> exclusion to their users.
>
> While such components could inherit the concept of an external lock,
On Fri, Feb 17, 2023 at 02:44:09PM +0100, Danilo Krummrich wrote:
> \#define SAMPLE_ITER(name, __mgr) \
> struct sample_iter name = { \
> .mas = __MA_STATE(&(__mgr)->mt, 0, 0),
This is usually called MA_STATE_INIT()
> #define sample_iter_for_each_range(it__, start__, end__) \
On Tue, Mar 28, 2023 at 01:14:34PM +1100, Alistair Popple wrote:
> +++ b/mm/memory.c
> @@ -3623,8 +3623,19 @@ static vm_fault_t remove_device_exclusive_entry(struct
> vm_fault *vmf)
> struct vm_area_struct *vma = vmf->vma;
> struct mmu_notifier_range range;
>
> - if
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