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In the former commits, the callback of isochronous context runs on usual work process. In the case, ALSA PCM device has a flag, nonatomic, to acquire mutex lock instead of spin lock for PCM substream group. This commit uses the flag. It has an advantage in the case that ALSA PCM application uses the large size of intermediate buffer, since it takes too long time even in tasklet softIRQ to process many of isochronous packets, then result in the delay of system event due to disabled IRQ so long. It is avertible to switch to nonatomic operation. Reviewed-by: Takashi Iwai <tiwai@suse.de> Tested-by: Edmund Raile <edmund.raile@protonmail.com> Link: https://lore.kernel.org/r/20240904125155.461886-6-o-takashi@sakamocchi.jp Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
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.