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iomap: convert iomap_unshare_iter to use large folios
Convert iomap_unshare_iter to create large folios if possible, since the write and zeroing paths already do that. I think this got missed in the conversion of the write paths that landed in 6.6-rc1. Cc: ritesh.list@gmail.com, willy@infradead.org Signed-off-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
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@ -1263,7 +1263,6 @@ static loff_t iomap_unshare_iter(struct iomap_iter *iter)
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const struct iomap *srcmap = iomap_iter_srcmap(iter);
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loff_t pos = iter->pos;
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loff_t length = iomap_length(iter);
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long status = 0;
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loff_t written = 0;
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/* don't bother with blocks that are not shared to start with */
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@ -1274,28 +1273,33 @@ static loff_t iomap_unshare_iter(struct iomap_iter *iter)
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return length;
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do {
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unsigned long offset = offset_in_page(pos);
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unsigned long bytes = min_t(loff_t, PAGE_SIZE - offset, length);
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struct folio *folio;
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int status;
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size_t offset;
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size_t bytes = min_t(u64, SIZE_MAX, length);
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status = iomap_write_begin(iter, pos, bytes, &folio);
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if (unlikely(status))
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return status;
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if (iter->iomap.flags & IOMAP_F_STALE)
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if (iomap->flags & IOMAP_F_STALE)
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break;
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status = iomap_write_end(iter, pos, bytes, bytes, folio);
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if (WARN_ON_ONCE(status == 0))
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offset = offset_in_folio(folio, pos);
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if (bytes > folio_size(folio) - offset)
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bytes = folio_size(folio) - offset;
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bytes = iomap_write_end(iter, pos, bytes, bytes, folio);
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if (WARN_ON_ONCE(bytes == 0))
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return -EIO;
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cond_resched();
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pos += status;
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written += status;
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length -= status;
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pos += bytes;
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written += bytes;
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length -= bytes;
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balance_dirty_pages_ratelimited(iter->inode->i_mapping);
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} while (length);
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} while (length > 0);
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return written;
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}
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