Displaying 5 results from an estimated 5 matches for "dmirror_do_read".
2020 Mar 19
0
[PATCH 3/4] mm: simplify device private page handling in hmm_range_fault
...range.end) {
> + range.start = addr;
> + range.end = min(addr + (ARRAY_SIZE(pfns) << PAGE_SHIFT), end);
> +
> + ret = dmirror_range_fault(dmirror, &range);
> + if (ret)
> + break;
> + }
> +
> + mmput(mm);
> + return ret;
> +}
> +
> +static int dmirror_do_read(struct dmirror *dmirror, unsigned long start,
> + unsigned long end, struct dmirror_bounce *bounce)
> +{
> + unsigned long pfn;
> + void *ptr;
> +
> + ptr = bounce->ptr + ((start - bounce->addr) & PAGE_MASK);
> +
> + for (pfn = start >> PAGE_SHIFT; pfn &...
2020 Mar 17
4
[PATCH 3/4] mm: simplify device private page handling in hmm_range_fault
On 3/17/20 5:59 AM, Christoph Hellwig wrote:
> On Tue, Mar 17, 2020 at 09:47:55AM -0300, Jason Gunthorpe wrote:
>> I've been using v7 of Ralph's tester and it is working well - it has
>> DEVICE_PRIVATE support so I think it can test this flow too. Ralph are
>> you able?
>>
>> This hunk seems trivial enough to me, can we include it now?
>
> I can send
2020 Mar 19
2
[PATCH 3/4] mm: simplify device private page handling in hmm_range_fault
...t; + range.end = min(addr + (ARRAY_SIZE(pfns) << PAGE_SHIFT), end);
>> +
>> + ret = dmirror_range_fault(dmirror, &range);
>> + if (ret)
>> + break;
>> + }
>> +
>> + mmput(mm);
>> + return ret;
>> +}
>> +
>> +static int dmirror_do_read(struct dmirror *dmirror, unsigned long start,
>> + unsigned long end, struct dmirror_bounce *bounce)
>> +{
>> + unsigned long pfn;
>> + void *ptr;
>> +
>> + ptr = bounce->ptr + ((start - bounce->addr) & PAGE_MASK);
>> +
>> + for (pfn =...
2019 Sep 11
6
[PATCH 0/4] HMM tests and minor fixes
These changes are based on Jason's latest hmm branch.
Patch 1 was previously posted here [1] but was dropped from the orginal
series. Hopefully, the tests will reduce concerns about edge conditions.
I'm sure more tests could be usefully added but I thought this was a good
starting point.
[1] https://lore.kernel.org/linux-mm/20190726005650.2566-6-rcampbell at nvidia.com/
Ralph Campbell
2020 Jan 13
9
[PATCH v6 0/6] mm/hmm/test: add self tests for HMM
This series adds new functions to the mmu interval notifier API to
allow device drivers with MMUs to dynamically mirror a process' page
tables based on device faults and invalidation callbacks. The Nouveau
driver is updated to use the extended API and a set of stand alone self
tests is added to help validate and maintain correctness.
The patches are based on linux-5.5.0-rc6 and are for