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SubjectRe: [PATCH 18/25] btrfs: Use readahead_batch_length
On Thu, Dec 17, 2020 at 12:12:46PM +0000, Matthew Wilcox wrote:
> ehh ... probably an off-by-one. Does subtracting 1 from contig_end fix it?
> I'll spool up a test VM shortly and try it out.

Yes, this fixed it:

- u64 contig_end = contig_start + readahead_batch_length(rac);
+ u64 contig_end = contig_start + readahead_batch_length(rac) - 1;

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