add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/fs/ocfs2/aops.c
..
..
@@ -1981,11 +1981,25 @@
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 	}
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 	if (unlikely(copied < len) && wc->w_target_page) {
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+		loff_t new_isize;
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+
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 		if (!PageUptodate(wc->w_target_page))
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 			copied = 0;
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-		ocfs2_zero_new_buffers(wc->w_target_page, start+copied,
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-				       start+len);
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+		new_isize = max_t(loff_t, i_size_read(inode), pos + copied);
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+		if (new_isize > page_offset(wc->w_target_page))
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+			ocfs2_zero_new_buffers(wc->w_target_page, start+copied,
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+					       start+len);
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+		else {
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+			/*
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+			 * When page is fully beyond new isize (data copy
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+			 * failed), do not bother zeroing the page. Invalidate
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+			 * it instead so that writeback does not get confused
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+			 * put page & buffer dirty bits into inconsistent
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+			 * state.
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+			 */
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+			block_invalidatepage(wc->w_target_page, 0, PAGE_SIZE);
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+		}
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 	}
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 	if (wc->w_target_page)
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 		flush_dcache_page(wc->w_target_page);