在 2022/2/16 9:34, Dan Williams 写道:
On Thu, Jan 27, 2022 at 4:41 AM Shiyang Ruan <ruansy.fnst@xxxxxxxxxxx> wrote:
The current dax_lock_page() locks dax entry by obtaining mapping and
index in page. To support 1-to-N RMAP in NVDIMM, we need a new function
to lock a specific dax entry
I do not see a call to dax_lock_entry() in this function, what keeps
this lookup valid after xas_unlock_irq()?
I am not sure if I understood your advice correctly: You said
dax_lock_entry() is not necessary in v9[1]. So, I deleted it.
[1]:
https://lore.kernel.org/linux-xfs/CAPcyv4jVDfpHb1DCW+NLXH2YBgLghCVy8o6wrc02CXx4g-Bv7Q@xxxxxxxxxxxxxx/
--
Thanks,
Ruan.
