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| author |   Song Liu <songliubraving@fb.com> | 2017-01-12 17:22:41 -0800 |
|---|---|---|
| committer |   Shaohua Li <shli@fb.com> | 2017-01-24 11:20:14 -0800 |
| commit | 86aa1397ddfde563b3692adadb8b8e32e97b4e5e (patch) | |
| tree | 866e94b5411650b70561ea663ce3680a6d4a364f /tools/perf/util/scripting-engines/trace-event-python.c | |
| parent | md/raid5-cache: delete meaningless code (diff) | |
| download | wireguard-linux-86aa1397ddfde563b3692adadb8b8e32e97b4e5e.tar.xz wireguard-linux-86aa1397ddfde563b3692adadb8b8e32e97b4e5e.zip | |
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>
Diffstat (limited to 'tools/perf/util/scripting-engines/trace-event-python.c')
0 files changed, 0 insertions, 0 deletions