Comment 26 for bug 1495317

Thanks Jen! From dmesg it looks like this is a crash in your radeon driver:

[11175.433534] VFS: file-max limit 330978 reached
[11175.433610] [drm:radeon_gem_object_create] *ERROR* Failed to allocate GEM object (4096, 2, 4096, -23)
[11175.433749] [drm:radeon_gem_object_create] *ERROR* Failed to allocate GEM object (4096, 2, 4096, -23)
[11175.433794] mixxx[2383]: segfault at 10 ip 00007fa71550485c sp 00007ffcd2e0d100 error 4 in radeonsi_dri.so[7fa7152c4000+310000]

But since the Radeon driver is complaining about failing to allocate, it could be that you're out of kernel memory or something. The VFS max file limit reached is suspicious. What filesystem is your Mixxx library on?

I see that this post seems to specifically see the VFS file-max limit line and also has a Radeon card with the open-source driver:
http://askubuntu.com/questions/158141/free-ram-disappears-memory-leak

Could you produce another backtrace? You can also try running Mixxx with the "--safeMode" commandline argument which disables OpenGL vinyl widgets and falls back on software waveforms.