Linux Multi-Queue Block IO Queueing Mechanism (blk-mq) Details - Thomas-Krenn-Wiki-en

Blk-mq integrates seamlessly into the Linux storage stack. It provides basic functions to device drivers for mapping I/O enquiries to multiple queues. The tasks are distributed across multiple threads and therefore to multiple CPU cores (per-core software queues). Blk-mq compatible drivers inform blk-mq how many parallel hardware queues a device supports (number of submission queues as part of the

[kotaponx]

これ、SSDとかの多くのキューを捌けるデバイスだと劇的にIOPS改善するよ……知らずに損してた。直線番長なシーケンシャルアクセスは変わらんけどね。

[y_uuki]

最近のカーネルだとI/Oスタックかわってた