<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - ns2_linux32: radeon VM fault on Hawaii (+mmap errors)" href="https://bugs.freedesktop.org/show_bug.cgi?id=93301#c14">Comment # 14</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - ns2_linux32: radeon VM fault on Hawaii (+mmap errors)" href="https://bugs.freedesktop.org/show_bug.cgi?id=93301">bug 93301</a> from <a class="email" href="mailto:maraeo@gmail.com" title="Marek Olšák <maraeo@gmail.com>"> Marek Olšák</a> <pre>No, Hawaii doesn't have DCC. The issue can indeed be that there is not enough address space. Mesa doesn't unmap most buffers, because mmap is a very costly operation. Such buffers are only unmapped when destroyed. This is obviously a problem on 32-bit. Possible solutions: 1) Always unmap buffers at appropriate places. This can have a significant performance cost in CPU-bound apps. 2) Clear pb_cache on mmap failure and try mmap again. (pb_cache typically contains staging buffers, which are always mapped. Therefore, pb_cache completely hides allocation, GPU mmap, and CPU mmap overhead, but it also contributes to address space usage.)</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>