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| author | Lars Ellenberg <lars.ellenberg@linbit.com> | 2013-03-19 18:16:44 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2013-03-22 18:13:59 -0600 |
| commit | 3a4d4eb3cb03fbc66696fc8cd472701d56f3aee7 (patch) | |
| tree | 06a5d9a18bb35f23e68c3cca745f28b3f409e41c /tools/perf/scripts/python/syscall-counts.py | |
| parent | ae8bf312e97d554b6aa32e7b2ceb993812ad0835 (diff) | |
drbd: prepare for new striped layout of activity log
Introduce two new on-disk meta data fields: al_stripes and al_stripe_size_4k
The intended use case is activity log on RAID 0 or similar.
Logically consecutive transactions will advance their on-disk position
by al_stripe_size_4k 4kB (transaction sized) blocks.
Right now, these are still asserted to be the backward compatible
values al_stripes = 1, al_stripe_size_4k = 8 (which amounts to 32kB).
Also introduce a caching member for meta_dev_idx in the in-core
structure: even though it is initially passed in in the rcu-protected
disk_conf structure, it cannot change without a detach/attach cycle.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'tools/perf/scripts/python/syscall-counts.py')
0 files changed, 0 insertions, 0 deletions