| commit | 86aa1397ddfde563b3692adadb8b8e32e97b4e5e | [log] [tgz] |
|---|---|---|
| author | Song Liu <songliubraving@fb.com> | Thu Jan 12 17:22:41 2017 -0800 |
| committer | Shaohua Li <shli@fb.com> | Tue Jan 24 11:20:14 2017 -0800 |
| tree | 866e94b5411650b70561ea663ce3680a6d4a364f | |
| parent | d46d29f072accb069cb42b5fbebcc77d9094a785 [diff] |
md/r5cache: read data into orig_page for prexor of cached data With write back cache, we use orig_page to do prexor. This patch makes sure we read data into orig_page for it. Flag R5_OrigPageUPTDODATE is added to show whether orig_page has the latest data from raid disk. We introduce a helper function uptodate_for_rmw() to simplify the a couple conditions in handle_stripe_dirtying(). Signed-off-by: Song Liu <songliubraving@fb.com> Signed-off-by: Shaohua Li <shli@fb.com>