Messages in this thread | | | From | Linus Torvalds <> | Date | Fri, 24 Feb 2023 12:16:49 -0800 | Subject | Re: [RFC][PATCH] cifs: Fix cifs_writepages_region() |
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On Fri, Feb 24, 2023 at 12:14 PM David Howells <dhowells@redhat.com> wrote: > > Then why do we have to wait for PG_writeback to complete?
At least for PG_writeback, it's about "the _previous_ dirty write is still under way, but - since PG_dirty is set again - the page has been dirtied since".
So we have to start _another_ writeback, because while the current writeback *might* have written the updated data, that is not at all certain or clear.
I'm not sure what the fscache rules are.
Linus
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