| From | David Howells <> | Subject | Re: [PATCH 01/67] mm: Stop filemap_read() from grabbing a superfluous page | Date | Tue, 19 Oct 2021 19:48:15 +0100 |
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Matthew Wilcox <willy@infradead.org> wrote:
> > + isize = i_size_read(inode); > > + if (unlikely(iocb->ki_pos >= isize)) > > + goto put_pages; > > + > > Is there a good reason to assign to isize here? I'd rather not, > because it complicates analysis, and a later change might look at > the isize read here, not realising it was a racy use. So I'd > rather see:
If we don't set isize, the loop will never end. Actually, maybe we can just break out at that point rather than going to put_pages.
David
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