25 Aug
2021
25 Aug
'21
11:15 a.m.
On 8/25/21 05:48, Alex Sierra wrote:
From: Ralph Campbell rcampbell@nvidia.com
ZONE_DEVICE struct pages have an extra reference count that complicates the code for put_page() and several places in the kernel that need to check the reference count to see that a page is not being used (gup, compaction, migration, etc.). Clean up the code so the reference count doesn't need to be treated specially for ZONE_DEVICE.
That's certainly welcome. I just wonder what was the reason to use 1 in the first place and why it's no longer necessary?