Displaying 5 results from an estimated 5 matches for "dmirror_bounce_init".
2020 Mar 19
0
[PATCH 3/4] mm: simplify device private page handling in hmm_range_fault
...d *cmd)
> +{
> + struct dmirror_bounce bounce;
> + unsigned long start, end;
> + unsigned long size = cmd->npages << PAGE_SHIFT;
> + int ret;
> +
> + start = cmd->addr;
> + end = start + size;
> + if (end < start)
> + return -EINVAL;
> +
> + ret = dmirror_bounce_init(&bounce, start, size);
> + if (ret)
> + return ret;
> +
> +again:
> + mutex_lock(&dmirror->mutex);
> + ret = dmirror_do_read(dmirror, start, end, &bounce);
> + mutex_unlock(&dmirror->mutex);
> + if (ret == 0)
> + ret = copy_to_user((void __user *)c...
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
...unce bounce;
>> + unsigned long start, end;
>> + unsigned long size = cmd->npages << PAGE_SHIFT;
>> + int ret;
>> +
>> + start = cmd->addr;
>> + end = start + size;
>> + if (end < start)
>> + return -EINVAL;
>> +
>> + ret = dmirror_bounce_init(&bounce, start, size);
>> + if (ret)
>> + return ret;
>> +
>> +again:
>> + mutex_lock(&dmirror->mutex);
>> + ret = dmirror_do_read(dmirror, start, end, &bounce);
>> + mutex_unlock(&dmirror->mutex);
>> + if (ret == 0)
>> +...
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