On Mon, Aug 3, 2020 at 9:12 AM Matthew Wilcox willy@infradead.org wrote:
On Mon, Aug 03, 2020 at 09:00:00AM -0700, Suren Baghdasaryan wrote:
On Mon, Aug 3, 2020 at 8:41 AM Matthew Wilcox willy@infradead.org wrote:
On Mon, Aug 03, 2020 at 02:47:19PM +0000, Kalesh Singh wrote:
+static void dma_buf_fd_install(int fd, struct file *filp) +{
trace_dma_buf_fd_ref_inc(current, filp);+}
You're adding a new file_operation in order to just add a new tracepoint? NACK.
Hi Matthew, The plan is to attach a BPF to this tracepoint in order to track dma-buf users. If you feel this is an overkill, what would you suggest as an alternative?
I'm sure BPF can attach to fd_install and filter on file->f_ops belonging to dma_buf, for example.
Sounds like a workable solution. Will explore that direction. Thanks Matthew!