Messages in this thread | | | Subject | Re: Change eats memory on my server | From | Thomas Zimmermann <> | Date | Mon, 18 Jan 2021 08:54:07 +0100 |
| |
Hi
Am 18.01.21 um 08:43 schrieb Christian König: > 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.
I have an idea what happens here. When the refcount is 0 in kmap, a new page mapping for the BO is being established. But VRAM helpers unmap the previous pages only on BO moves or frees; not in kunmap. So the old mapping might still be around. I'll send out a test patch later today.
Best regards Thomas
> > 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 > > _______________________________________________ > dri-devel mailing list > dri-devel@lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/dri-devel
-- Thomas Zimmermann Graphics Driver Developer SUSE Software Solutions Germany GmbH Maxfeldstr. 5, 90409 Nürnberg, Germany (HRB 36809, AG Nürnberg) Geschäftsführer: Felix Imendörffer
[unhandled content-type:application/pgp-signature] | |