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There are intermittent failures occurred when stressing the
arch-timer test in a Qemu VM:
Guest assert failed, vcpu 0; stage; 4; iter: 3
==== Test Assertion Failure ====
aarch64/arch_timer.c:196: config_iter + 1 == irq_iter
pid=4048 tid=4049 errno=4 - Interrupted system call
1 0x000000000040253b: test_vcpu_run at arch_timer.c:248
2 0x0000ffffb60dd5c7: ?? ??:0
3 0x0000ffffb6145d1b: ?? ??:0
0x3 != 0x2 (config_iter + 1 != irq_iter)e
Further test and debug show that the timeout for an interrupt
to arrive do have random high fluctuation, espectially when
testing in an virtual environment.
To alleviate this issue, just expose the timeout value as user
configurable and print some hint message to increase the value
when hitting the failure..
Signed-off-by: Haibo Xu <haibo1.xu@intel.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Anup Patel <anup@brainfault.org>
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| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
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| README | ||
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.
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.