| From | David Howells <> | Subject | Re: [RFC PATCH 54/61] afs: Wait on PG_fscache before modifying/releasing a page | Date | Wed, 06 May 2020 08:57:58 +0100 |
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Matthew Wilcox <willy@infradead.org> wrote:
> > PG_fscache is going to be used to indicate that a page is being written to > > the cache, and that the page should not be modified or released until it's > > finished. > > > > Make afs_invalidatepage() and afs_releasepage() wait for it. > > Well, why? Keeping a refcount on the page will prevent it from going > away while it's being written to storage. And the fact that it's > being written to this cache is no reason to delay the truncate of a file > (is it?)
Won't that screw up ITER_MAPPING? Does that mean that ITER_MAPPING isn't viable?
David
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