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ANDROID: dma-buf: heaps: Add a sysfs file to report total pool size.

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In order to help with memory accounting, expose the total pool size of
all DMA-BUF heaps at /sys/kernel/dma_heap/total_pools_kb.

This information will be exposed as part of Android Bugreport[1].

[1]: https://android-review.googlesource.com/q/topic:%22b%252F167709539%22+(status:open%20OR%20status:merged)

Bug: 167709539
Change-Id: I6a1b52517e73103122690f6567f4f295db9ca1ad
Signed-off-by: Hridya Valsaraju <hridya@google.com>
This commit is contained in:
Hridya Valsaraju
2021-01-31 20:38:27 -08:00
parent 7f612dda44
commit 32fe36e04d
3 changed files with 72 additions and 3 deletions
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Documentation/ABI/testing/sysfs-kernel-dmaheap Normal file
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What: /sys/kernel/dma_heap/total_pools_kb
Date: Feb 2021
KernelVersion: 5.10
Contact: Hridya Valsaraju <hridya@google.com>,
Description:
The total_pools_kb file is read-only and specifies how much
memory in Kb is allocated to DMA-BUF heap pools.