tjh.dev
Linux kernel mirror (for testing)
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kernel
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linux
1What: /sys/class/dax/
2Date: May, 2016
3KernelVersion: v4.7
4Contact: linux-nvdimm@lists.01.org
5Description: Device DAX is the device-centric analogue of Filesystem
6 DAX (CONFIG_FS_DAX). It allows memory ranges to be
7 allocated and mapped without need of an intervening file
8 system. Device DAX is strict, precise and predictable.
9 Specifically this interface:
10
11 1. Guarantees fault granularity with respect to a given
12 page size (pte, pmd, or pud) set at configuration time.
13
14 2. Enforces deterministic behavior by being strict about
15 what fault scenarios are supported.
16
17 The /sys/class/dax/ interface enumerates all the
18 device-dax instances in the system. The ABI is
19 deprecated and will be removed after 2020. It is
20 replaced with the DAX bus interface /sys/bus/dax/ where
21 device-dax instances can be found under
22 /sys/bus/dax/devices/