lkml.org 
[lkml]   [2022]   [Jun]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 05/14] dma-buf: provide file RSS for DMA-buf files
Date
Just return the size of the DMA-buf in pages since pages allocated or
mapped through DMA-bufs are usually not accounted elsewhere.

Signed-off-by: Christian König <christian.koenig@amd.com>
---
drivers/dma-buf/dma-buf.c | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c
index 630133284e2b..16162ec3538c 100644
--- a/drivers/dma-buf/dma-buf.c
+++ b/drivers/dma-buf/dma-buf.c
@@ -494,6 +494,11 @@ static void dma_buf_show_fdinfo(struct seq_file *m, struct file *file)
spin_unlock(&dmabuf->name_lock);
}

+static long dma_buf_file_rss(struct file *file)
+{
+ return i_size_read(file_inode(file)) >> PAGE_SHIFT;
+}
+
static const struct file_operations dma_buf_fops = {
.release = dma_buf_file_release,
.mmap = dma_buf_mmap_internal,
@@ -502,6 +507,7 @@ static const struct file_operations dma_buf_fops = {
.unlocked_ioctl = dma_buf_ioctl,
.compat_ioctl = compat_ptr_ioctl,
.show_fdinfo = dma_buf_show_fdinfo,
+ .file_rss = dma_buf_file_rss,
};

/*
--
2.25.1
\
 
 \ /
  Last update: 2022-06-24 10:07    [W:0.074 / U:2.472 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site