Hi Eli,
have you already tried using kmemleak?
This sounds like a leak of memory allocated using kmalloc(), so kmemleak
should be able to catch it.
Regards,
Christian.
Am 17.01.21 um 06:08 schrieb Eli Cohen:
On Fri, Jan 15, 2021 at 10:03:50AM +0100, Thomas Zimmermann wrote:
Could you please double-check that 3fb91f56aea4 ("drm/udl: Retrieve USB
device from struct drm_device.dev") works correctly
Checked again, it does not seem to leak.
and that 823efa922102
("drm/cma-helper: Remove empty drm_gem_cma_prime_vunmap()") is broken?
Yes, this one leaks, as does the one preceding it:
1086db71a1db ("drm/vram-helper: Remove invariant parameters from internal kmap function")
For one of the broken commits, could you please send us the output of
dmesg | grep -i drm
after most of the memory got leaked?
I ran the following script in the shell:
while true; do cat /proc/meminfo | grep MemFree:; sleep 5; done
and this is what I saw before I got disconnected from the shell:
MemFree: 148208 kB
MemFree: 148304 kB
MemFree: 146660 kB
Connection to nps-server-24 closed by remote host.
Connection to nps-server-24 closed.
I also mointored the output of dmesg | grep -i drm
The last output I was able to save on disk is this:
[ 46.140720] ast 0000:03:00.0: [drm] Using P2A bridge for configuration
[ 46.140737] ast 0000:03:00.0: [drm] AST 2500 detected
[ 46.140754] ast 0000:03:00.0: [drm] Analog VGA only
[ 46.140772] ast 0000:03:00.0: [drm] dram MCLK=800 Mhz type=7 bus_width=16
[ 46.153553] [drm] Initialized ast 0.1.0 20120228 for 0000:03:00.0 on minor 0
[ 46.165097] fbcon: astdrmfb (fb0) is primary device
[ 46.391381] ast 0000:03:00.0: [drm] fb0: astdrmfb frame buffer device
[ 56.097697] systemd[1]: Starting Load Kernel Module drm...
[ 56.343556] systemd[1]: modprobe@drm.service: Succeeded.
[ 56.350382] systemd[1]: Finished Load Kernel Module drm.
[13319.469462] [ 2683] 70889 2683 55586 0 73728 138 0 tdrm
[13320.658386] [ 2683] 70889 2683 55586 0 73728 138 0 tdrm
[13321.800970] [ 2683] 70889 2683 55586 0 73728 138 0 tdrm
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