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buf_page_ibuf_merge_try(): A new, separate function for invoking ibuf_merge_or_delete_for_page() when needed. Use the already requested page latch for determining if the call is necessary. If it is and if we are currently holding rw_latch==RW_S_LATCH, upgrading to an exclusive latch may involve waiting that another thread acquires and releases a U or X latch on the page. If we have to wait, we must recheck if the call to ibuf_merge_or_delete_for_page() is still needed. If the page turns out to be corrupted, we will release and fail the operation. Finally, the exclusive page latch will be downgraded to the originally requested latch. ssux_lock_impl::rd_u_upgrade_try(): Attempt to upgrade a shared lock to an update lock. sux_lock::s_x_upgrade_try(): Attempt to upgrade a shared lock to exclusive. sux_lock::s_x_upgrade(): Upgrade a shared lock to exclusive. Return whether a wait was elided. ssux_lock_impl::u_rd_downgrade(), sux_lock::u_s_downgrade(): Downgrade an update lock to shared. |
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| archive | ||
| blackhole | ||
| columnstore | ||
| connect | ||
| csv | ||
| example | ||
| federated | ||
| federatedx | ||
| heap | ||
| innobase | ||
| maria | ||
| mroonga | ||
| myisam | ||
| myisammrg | ||
| oqgraph | ||
| perfschema | ||
| rocksdb | ||
| sequence | ||
| sphinx | ||
| spider | ||
| test_sql_discovery | ||