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7e7df71fd5
I've got this infinite stacktrace when debugging another problem: [ 908.795225] INFO: rcu_preempt detected stalls on CPUs/tasks: [ 908.796176] 1-...!: (1 GPs behind) idle=952/1/4611686018427387904 softirq=1462/1462 fqs=355 [ 908.797692] 2-...!: (1 GPs behind) idle=f42/1/4611686018427387904 softirq=1550/1551 fqs=355 [ 908.799189] (detected by 0, t=2109 jiffies, g=130, c=129, q=235) [ 908.800284] Task dump for CPU 1: [ 908.800871] kworker/1:1 R running task 0 32 2 0x00000022 [ 908.802127] Workqueue: writecache-writeabck writecache_writeback [dm_writecache] [ 908.820285] Call trace: [ 908.824785] __switch_to+0x68/0x90 [ 908.837661] 0xfffffe00603afd90 [ 908.844119] 0xfffffe00603afd90 [ 908.850091] 0xfffffe00603afd90 [ 908.854285] 0xfffffe00603afd90 [ 908.863538] 0xfffffe00603afd90 [ 908.865523] 0xfffffe00603afd90 The machine just locked up and kept on printing the same line over and over again. This patch fixes it. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
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 Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.
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.