Can anyone help me reason about the readpages() callback in vma_operations?
Do the pages that come in the argument list from readahead come
locked? The documentation in the kernel says nothing about locking on
the way in (Documentation/filesystems/Locking) unlike readpage. It
does say that the pages should be unlocked when the operation is done.
Should I assume that the readpages implementer needs to take care to
lock those pages her / his self?
I've been reading through the code for different filesystems to
understand what should happen but I'm not a 100% clear on it. Thanks
in advance,
- Milosz