Displaying 3 results from an estimated 3 matches for "wait_fsdax_unref".
2020 Sep 16
1
[PATCH] mm: remove extra ZONE_DEVICE struct page refcount
On Mon, Sep 14, 2020 at 04:10:38PM -0700, Dan Williams wrote:
> You also need to fix up ext4_break_layouts() and
> xfs_break_dax_layouts() to expect ->_refcount is 0 instead of 1. This
> also needs some fstests exposure.
While we're at it, can we add a wait_fsdax_unref helper macro that hides
the _refcount access from the file systems?
2020 Sep 17
0
[PATCH] mm: remove extra ZONE_DEVICE struct page refcount
...e:
> On Mon, Sep 14, 2020 at 04:10:38PM -0700, Dan Williams wrote:
>> You also need to fix up ext4_break_layouts() and
>> xfs_break_dax_layouts() to expect ->_refcount is 0 instead of 1. This
>> also needs some fstests exposure.
>
> While we're at it, can we add a wait_fsdax_unref helper macro that hides
> the _refcount access from the file systems?
Sure. I'll add a separate patch for it in v2.
2020 Sep 14
5
[PATCH] mm: remove extra ZONE_DEVICE struct page refcount
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.
Signed-off-by: Ralph Campbell <rcampbell at