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A mirror of the official Linux kernel repository just in case
748fe4399f
The function hid_register_field() might allocate more than 32k, which would use order-4 contiguous memory if the parameter usage exceeds 1024. However, after the system runs for a while, the memory can become heavily fragmented. This increases the likelihood of order-4 page allocation failure. Here’s the relevant log. [71553.093623]kworker/1: 0: page allocation failure: order:4, mode:0x40dc0(GFP_KERNEL|__GFP_COMP|__GFP_ZERO), nodemask=(null),cpuset=/,mems_allowed=0 [71553.093669]Workqueue: events uhid_device_add_worker [71553.093683]Call trace: [71553.093687]: dump_backtrace+0xf4/0x118 [71553.093696]: show_stack+0x18/0x24 [71553.093702]: dump_stack_lvl+0x60/0x7c [71553.093710]: dump_stack+0x18/0x3c [71553.093717]: warn_alloc+0xf4/0x174 [71553.093725]: __alloc_pages_slowpath+0x1ba0/0x1cac [71553.093732]: __alloc_pages+0x460/0x560 [71553.093738]: __kmalloc_large_node+0xbc/0x1f8 [71553.093746]: __kmalloc+0x144/0x254 [71553.093752]: hid_add_field+0x13c/0x308 [71553.093758]: hid_parser_main+0x250/0x298 [71553.093765]: hid_open_report+0x214/0x30c [71553.093771]: mt_probe+0x130/0x258 [71553.093778]: hid_device_probe+0x11c/0x1e4 [71553.093784]: really_probe+0xe4/0x388 [71553.093791]: __driver_probe_device+0xa0/0x12c [71553.093798]: driver_probe_device+0x44/0x214 [71553.093804]: __device_attach_driver+0xdc/0x124 [71553.093812]: bus_for_each_drv+0x88/0xec [71553.093818]: __device_attach+0x84/0x170 [71553.093824]: device_initial_probe+0x14/0x20 [71553.093831]: bus_probe_device+0x48/0xd0 [71553.093836]: device_add+0x248/0x928 [71553.093844]: hid_add_device+0xf8/0x1a4 [71553.093850]: uhid_device_add_worker+0x24/0x144 [71553.093857]: process_one_work+0x158/0x804 [71553.093865]: worker_thread+0x15c/0x494 [71553.093872]: kthread+0xf4/0x1e4 [71553.093880]: ret_from_fork+0x10/0x20 To fix the allocation failure, use kvzalloc() instead of kzalloc(). Signed-off-by: Hailong.Liu <hailong.liu@oppo.com> Acked-by: Barry Song <baohua@kernel.org> Signed-off-by: Jiri Kosina <jkosina@suse.com> |
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| init | ||
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.