Op 14-12-12 10:36, sumit.sem...@ti.com schreef: > From: Sumit Semwal <sumit.sem...@linaro.org> > > Add debugfs support to make it easier to print debug information > about the dma-buf buffers. > I like the idea, I don't know if it could be done in a free manner, but for bonus points could we also have the dma-buf fd be obtainable that way from a debugfs entry?
Doing so would allow me to 'steal' a dma-buf from an existing mapping easily, and test against that. Also I think the name of the device and process that exported the dma-buf would be useful to have as well, even if in case of the device that would mean changing the api slightly to record it. I was thinking of having a directory structure like this: /sys/kernel/debug/dma_buf/stats and then for each dma-buf: /sys/kernel/debug/dma-buf/exporting_file.c/<number>-fd /sys/kernel/debug/dma-buf/exporting_file.c/<number>-attachments /sys/kernel/debug/dma-buf/exporting_file.c/<number>-info Opening the fd file would give you back the original fd, or fail with -EIO if refcount was dropped to 0. Would something like this be doable? I don't know debugfs that well, but I don't see why it wouldn't be, ~Maarten _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/dri-devel
