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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
The Linux Storage Stack Diagram shows the layout of the the Linux storage stack. Downloads Diagram for Linux Kernel 6.2 Linux Storage Stack Diagram v6.2 (for Linux Kernel 6.2 and 6.1): Linux I/O Stack Diagram v6.2 (20230309): ZIP (includes .drawio and .svg) PDF PNG Diagram for Linux Kernel 4.10 Linux Storage Stack Diagram v4.10 (for Linux Kernel 4.10): Linux I/O Stack Diagram v4.10 (20170310): SVG
Please note that this article / this category refers either on older software / hardware components or is no longer maintained for other reasons. This page is no longer updated and is purely for reference purposes still here in the archive available. The Linux start process sporadically crashes for servers with the Supermicro Motherboards with the message mei: Init hw failure. or mei 0000:00:16.0:
Under Linux, the Page Cache accelerates many accesses to files on non volatile storage. This happens because, when it first reads from or writes to data media like hard drives, Linux also stores data in unused areas of memory, which acts as a cache. If this data is read again later, it can be quickly read from this cache in memory. This article will supply valuable background information about thi
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