Re: 2.6.33.2 kmalloc-8 slab leaks ~512 objects per second
On Thu, 13 May 2010, Tvrtko Ursulin wrote: You could just enable CONFIG_DEBUG_KMEMLEAK on 2.6.33, mount the debugfs and do a 'cat /sys/kernel/debug/kmemleak' after a half-hour or so. I could do it if radeon/drm guys would be interested in those results? (Given how 2.6.34-rc7 is not leaking.) Did you get a chance to find out if kmemleak was able to identify the source of this problem? -- -- ___ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
Re: 2.6.33.2 kmalloc-8 slab leaks ~512 objects per second
On Wednesday 26 May 2010 10:21:36 David Rientjes wrote: On Thu, 13 May 2010, Tvrtko Ursulin wrote: You could just enable CONFIG_DEBUG_KMEMLEAK on 2.6.33, mount the debugfs and do a 'cat /sys/kernel/debug/kmemleak' after a half-hour or so. I could do it if radeon/drm guys would be interested in those results? (Given how 2.6.34-rc7 is not leaking.) Did you get a chance to find out if kmemleak was able to identify the source of this problem? Well no, I asked DRM/radeon guys to explicitly say whether it would be useful, otherwise it is unfortunately sufficiently low on my priority list that it will probably never happen. Tvrtko Sophos Plc, The Pentagon, Abingdon Science Park, Abingdon, OX14 3YP, United Kingdom. Company Reg No 2096520. VAT Reg No GB 348 3873 20. -- -- ___ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
Re: 2.6.33.2 kmalloc-8 slab leaks ~512 objects per second
[Snipped localdomain guy from Cc] On Wednesday 12 May 2010 14:29:16 Jerome Glisse wrote: On Wed, May 12, 2010 at 11:50:41AM +0100, Tvrtko Ursulin wrote: On Wednesday 12 May 2010 11:38:05 Tvrtko Ursulin wrote: [snip] I think it is DRM (radeon) related, leak stopped when I closed all X programs. I am compiling 2.6.33.3 right now and will soon reboot into it. Leak is still present in 2.6.33.3 - the more GUI activity the more it leaks. So the ~512 objects per second was with xosview running, but moving windows or browsing through menus can leak a lot more (per second). Is version of userspace drm library interesting? It is 2.4.20 (libdrm-2.4.20-12.1.x86_64). Tvrtko Do the number of object stay constant over longuer period of time (30min, 1hour) ? If there was a leak i think we would have notice it by now, some of my desktop are running 24h for several days with radeon kms. No, it grew constantly in presence of compositing activity under X by 512 8 byte objects per second or more, possibly multiples of 512 or very close. If you haven't seen my original post, kmalloc-8 cache after some days of uptime looked like this: kmalloc-8 68044800 68044800 8 5121 : tunables000 : slabdata 132900 132900 0 I am now running 2.6.34-rc7 which seems not to leak. Tvrtko Sophos Plc, The Pentagon, Abingdon Science Park, Abingdon, OX14 3YP, United Kingdom. Company Reg No 2096520. VAT Reg No GB 348 3873 20. -- -- ___ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
Re: 2.6.33.2 kmalloc-8 slab leaks ~512 objects per second
On Thursday 13 May 2010 13:29:49 Catalin Marinas wrote: Tvrtko Ursulin tvrtko.ursu...@sophos.com wrote: On Wednesday 12 May 2010 14:00:51 Pekka Enberg wrote: [snip] You might want to try out the built-in kernel memory leak detector. See Documentation/kmemleak.txt for details how to enable it and use it. Thanks for the suggestion, I will have to try it out once but not this time :) because 2.6.34-rc7 seems to be fine, or in other words not leaking. You could just enable CONFIG_DEBUG_KMEMLEAK on 2.6.33, mount the debugfs and do a 'cat /sys/kernel/debug/kmemleak' after a half-hour or so. I could do it if radeon/drm guys would be interested in those results? (Given how 2.6.34-rc7 is not leaking.) Tvrtko Sophos Plc, The Pentagon, Abingdon Science Park, Abingdon, OX14 3YP, United Kingdom. Company Reg No 2096520. VAT Reg No GB 348 3873 20. -- -- ___ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
Re: 2.6.33.2 kmalloc-8 slab leaks ~512 objects per second
On Wednesday 12 May 2010 11:21:48 Tvrtko Ursulin wrote: Hi all, As the subject says, is this a know issue? I have been tracking the growth at one second intervals and it looks like this: 512 (67716608) Slab: 606744 kB 512 (67717120) Slab: 606752 kB 512 (67717632) Slab: 606756 kB 0 (67718144) Slab: 606756 kB 512 (67718144) Slab: 606760 kB 1024 (67718656) Slab: 606768 kB 512 (67719680) Slab: 606772 kB 512 (67720192) Slab: 606776 kB 0 (67720704) Slab: 606776 kB 512 (67720704) Slab: 606780 kB First fiels is the diff in numobj, in parentheses is actual numobj and last is the total slab size from /proc/meminfo. kmalloc-8 68044800 68044800 8 5121 : tunables00 0 : slabdata 132900 132900 0 dm-io slab also seems large, don't know... : dm_io 75924 147288 40 1021 : tunables000 : slabdata 1444 1444 0 Some other info about the system/kernel is attached. I think it is DRM (radeon) related, leak stopped when I closed all X programs. I am compiling 2.6.33.3 right now and will soon reboot into it. Tvrtko Sophos Plc, The Pentagon, Abingdon Science Park, Abingdon, OX14 3YP, United Kingdom. Company Reg No 2096520. VAT Reg No GB 348 3873 20. -- -- ___ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
Re: 2.6.33.2 kmalloc-8 slab leaks ~512 objects per second
On Wednesday 12 May 2010 11:38:05 Tvrtko Ursulin wrote: [snip] I think it is DRM (radeon) related, leak stopped when I closed all X programs. I am compiling 2.6.33.3 right now and will soon reboot into it. Leak is still present in 2.6.33.3 - the more GUI activity the more it leaks. So the ~512 objects per second was with xosview running, but moving windows or browsing through menus can leak a lot more (per second). Is version of userspace drm library interesting? It is 2.4.20 (libdrm-2.4.20-12.1.x86_64). Tvrtko Sophos Plc, The Pentagon, Abingdon Science Park, Abingdon, OX14 3YP, United Kingdom. Company Reg No 2096520. VAT Reg No GB 348 3873 20. -- -- ___ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
Re: 2.6.33.2 kmalloc-8 slab leaks ~512 objects per second
On Wed, May 12, 2010 at 11:50:41AM +0100, Tvrtko Ursulin wrote: On Wednesday 12 May 2010 11:38:05 Tvrtko Ursulin wrote: [snip] I think it is DRM (radeon) related, leak stopped when I closed all X programs. I am compiling 2.6.33.3 right now and will soon reboot into it. Leak is still present in 2.6.33.3 - the more GUI activity the more it leaks. So the ~512 objects per second was with xosview running, but moving windows or browsing through menus can leak a lot more (per second). Is version of userspace drm library interesting? It is 2.4.20 (libdrm-2.4.20-12.1.x86_64). Tvrtko Do the number of object stay constant over longuer period of time (30min, 1hour) ? If there was a leak i think we would have notice it by now, some of my desktop are running 24h for several days with radeon kms. Cheers, Jerome -- -- ___ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
