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ChangSyun Peng authored
Degraded raid6 always do reconstruct-write now. With raid6 xor supported, we can do rmw in degraded raid6. This patch can reduce many read IOs to improve performance. If the failed disk is P, Q or the disk we want to write to, we may need to do reconstruct-write in max degraded raid6. In this situation we can not read enough data from handle_stripe_dirtying() so we have to set force_rcw in handle_stripe_fill() to read all data. Reviewed-by:
Alex Wu <alexwu@synology.com> Reviewed-by:
BingJing Chang <bingjingc@synology.com> Reviewed-by:
Danny Shih <dannyshih@synology.com> Signed-off-by:
ChangSyun Peng <allenpeng@synology.com> Signed-off-by:
Song Liu <songliubraving@fb.com>
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