mirror of
https://github.com/torvalds/linux.git
synced 2025-04-06 09:13:43 +00:00
2db7ab8c10
With only eight bits per grace-period sequence number, wrap can happen in 64 grace periods. This commit therefore increases this to sixteen bits for normal grace-period sequence numbers and the combined short-form polling sequence numbers, thus deferring wrap for at least 16,384 grace periods. Because expedited grace periods go faster, expand these to 24 bits, deferring wrap for at least 4,194,304 expedited grace periods. These longer wrap times makes it easier to correlate these numbers to trace-event output. Note that the low-order two bits are reserved for intra-grace-period state, hence the above wrap numbers being a factor of four smaller than you might expect. Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Boqun Feng <boqun.feng@gmail.com>