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| author | Hridya Valsaraju <hridya@google.com> | 2021-07-13 07:07:38 +0300 |
|---|---|---|
| committer | Christian König <christian.koenig@amd.com> | 2021-07-20 12:06:59 +0300 |
| commit | c715def51591a874a9fcfdc9a05d543e8797e697 (patch) | |
| tree | 393cf502f7578c1e848de6471b50dc23a68d7469 /Documentation | |
| parent | 613ba71619cfe0e0a4b855aa1a2e337fab2dd416 (diff) | |
| download | linux-c715def51591a874a9fcfdc9a05d543e8797e697.tar.xz | |
dma-buf: Delete the DMA-BUF attachment sysfs statistics
The DMA-BUF attachment statistics form a subset of the DMA-BUF
sysfs statistics that recently merged to the drm-misc tree. They are not
UABI yet since they have not merged to the upstream Linux kernel.
Since there has been a reported a performance regression due to the
overhead of sysfs directory creation/teardown during
dma_buf_attach()/dma_buf_detach(), this patch deletes the DMA-BUF
attachment statistics from sysfs.
Fixes: bdb8d06dfefd ("dmabuf: Add the capability to expose DMA-BUF stats in sysfs")
Signed-off-by: Hridya Valsaraju <hridya@google.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210713040742.2680135-1-hridya@google.com
Signed-off-by: Christian König <christian.koenig@amd.com>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-kernel-dmabuf-buffers | 28 |
1 files changed, 0 insertions, 28 deletions
diff --git a/Documentation/ABI/testing/sysfs-kernel-dmabuf-buffers b/Documentation/ABI/testing/sysfs-kernel-dmabuf-buffers index a243984ed420..5d3bc997dc64 100644 --- a/Documentation/ABI/testing/sysfs-kernel-dmabuf-buffers +++ b/Documentation/ABI/testing/sysfs-kernel-dmabuf-buffers @@ -22,31 +22,3 @@ KernelVersion: v5.13 Contact: Hridya Valsaraju <hridya@google.com> Description: This file is read-only and specifies the size of the DMA-BUF in bytes. - -What: /sys/kernel/dmabuf/buffers/<inode_number>/attachments -Date: May 2021 -KernelVersion: v5.13 -Contact: Hridya Valsaraju <hridya@google.com> -Description: This directory will contain subdirectories representing every - attachment of the DMA-BUF. - -What: /sys/kernel/dmabuf/buffers/<inode_number>/attachments/<attachment_uid> -Date: May 2021 -KernelVersion: v5.13 -Contact: Hridya Valsaraju <hridya@google.com> -Description: This directory will contain information on the attached device - and the number of current distinct device mappings. - -What: /sys/kernel/dmabuf/buffers/<inode_number>/attachments/<attachment_uid>/device -Date: May 2021 -KernelVersion: v5.13 -Contact: Hridya Valsaraju <hridya@google.com> -Description: This file is read-only and is a symlink to the attached device's - sysfs entry. - -What: /sys/kernel/dmabuf/buffers/<inode_number>/attachments/<attachment_uid>/map_counter -Date: May 2021 -KernelVersion: v5.13 -Contact: Hridya Valsaraju <hridya@google.com> -Description: This file is read-only and contains a map_counter indicating the - number of distinct device mappings of the attachment. |