1What: /sys/module/pch_phub/drivers/.../pch_mac 2Date: August 2010 3KernelVersion: 2.6.35 4Contact: masa-korg@dsn.okisemi.com 5Description: Write/read GbE MAC address. 6 7What: /sys/module/pch_phub/drivers/.../pch_firmware 8Date: August 2010 9KernelVersion: 2.6.35 10Contact: masa-korg@dsn.okisemi.com 11Description: Write/read Option ROM data. 12 13 14What: /sys/module/ehci_hcd/drivers/.../uframe_periodic_max 15Date: July 2011 16KernelVersion: 3.1 17Contact: Kirill Smelkov <kirr@mns.spb.ru> 18Description: Maximum time allowed for periodic transfers per microframe (μs) 19 20 Note: 21 USB 2.0 sets maximum allowed time for periodic transfers per 22 microframe to be 80%, that is 100 microseconds out of 125 23 microseconds (full microframe). 24 25 However there are cases, when 80% max isochronous bandwidth is 26 too limiting. For example two video streams could require 110 27 microseconds of isochronous bandwidth per microframe to work 28 together. 29 30 Through this setting it is possible to raise the limit so that 31 the host controller would allow allocating more than 100 32 microseconds of periodic bandwidth per microframe. 33 34 Beware, non-standard modes are usually not thoroughly tested by 35 hardware designers, and the hardware can malfunction when this 36 setting differ from default 100. 37 38What: /sys/module/*/{coresize,initsize} 39Date: Jan 2012 40KernelVersion: 3.3 41Contact: Kay Sievers <kay.sievers@vrfy.org> 42Description: Module size in bytes. 43 44What: /sys/module/*/initstate 45Date: Nov 2006 46KernelVersion: 2.6.19 47Contact: Kay Sievers <kay.sievers@vrfy.org> 48Description: Show the initialization state(live, coming, going) of 49 the module. 50 51What: /sys/module/*/import_ns 52Date: January 2026 53KernelVersion: 7.1 54Contact: linux-modules@vger.kernel.org 55Description: List of symbol namespaces imported by this module via 56 MODULE_IMPORT_NS(). Each namespace appears on a separate line. 57 This file only exists for modules that import at least one 58 namespace. 59 60What: /sys/module/*/taint 61Date: Jan 2012 62KernelVersion: 3.3 63Contact: Kay Sievers <kay.sievers@vrfy.org> 64Description: Module taint flags: 65 == ===================== 66 P proprietary module 67 O out-of-tree module 68 F force-loaded module 69 C staging driver module 70 E unsigned module 71 K livepatch module 72 N in-kernel test module 73 == ===================== 74 75What: /sys/module/grant_table/parameters/free_per_iteration 76Date: July 2023 77KernelVersion: 6.5 but backported to all supported stable branches 78Contact: Xen developer discussion <xen-devel@lists.xenproject.org> 79Description: Read and write number of grant entries to attempt to free per iteration. 80 81 Note: Future versions of Xen and Linux may provide a better 82 interface for controlling the rate of deferred grant reclaim 83 or may not need it at all. 84Users: Qubes OS (https://www.qubes-os.org) 85