在 2023/2/5 19:42, Matthew Wilcox 写道:
On Sat, Feb 04, 2023 at 02:58:36PM +0000, Shiyang Ruan wrote:
@@ -222,8 +222,8 @@ xfs_dax_notify_failure(
len -= ddev_start - offset;
offset = 0;
}
- if (offset + len > ddev_end)
- len -= ddev_end - offset;
+ if (offset + len - 1 > ddev_end)
+ len -= offset + len - 1 - ddev_end;
This _looks_ wrong. Are you sure it shouldn't be:
len = ddev_end - offset + 1;
It is to make sure the range won't beyond the end of device.
But actually, both of us are rgiht.
Mine: len -= offset + len - 1 - ddev_end;
=> len = len - (offset + len - 1 - ddev_end);
=> len = len - offset - len + 1 + ddev_end;
=> len = ddev_end - offset + 1; --> Yours
I forgot to simplify it. Will fix.
--
Thanks,
Ruan.
