22 Dec
2021
22 Dec
'21
6:40 p.m.
On Wed, Dec 22, 2021 at 8:08 AM Jan Kara jack@suse.cz wrote:
Well, but O_DIRECT reads must use FOLL_PIN in any case because they modify page data (and so we need to detect them both for COW and filesystem needs).
Well, O_DIRECT reads do, but not necessarily writes.
And hey, even reads have been dodgy in the past when we didn't really have the pinning logic - there's been a lot of users that just wanted it to work for their particular use-case rather than in general and in all situations..
Linus