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Usage: cat /sys/kernel/debug/dma_buf/dmaprocs mediaserver (PID 662) size: 99044 DMA Buffers: Name Exp_name Size (KB) Time Alive (sec) (null) rockchipdrm 452 15 (null) rockchipdrm 68 13 (null) rockchipdrm 5988 15 ispserver (PID 649) size: 44528 DMA Buffers: Name Exp_name Size (KB) Time Alive (sec) (null) videobuf2_vmalloc 12 16 (null) videobuf2_dma_sg 316 14 (null) videobuf2_vmalloc 4 16 Change-Id: Icf46e9d585847ef6dafbddcd24e589046e3ff015 Signed-off-by: Jianqun Xu <jay.xu@rock-chips.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.