Re: [PATCH v3 0/8] alpha: enable generic entry infrastructure

[Michael Cree]

On Fri, Jun 12, 2026 at 10:26:48PM +0200, Magnus Lindholm wrote:
> This series moves Alpha closer to the common architecture infrastructure
> and enables GENERIC_ENTRY and GENERIC_IRQ_ENTRY. This is v3 of this patch
> series, please see below for changes since v1 and v2.

I am seeing sporadic Xorg crashes with this patchset applied to a 7.0
stable series kernel, usually within a minute of logging into the
desktop. The rest of system keeps running fine and there are no
messsages in the kernel log.  I am testing on an XP1000 with Radeon
HD4350 graphics card.  The same kernel without this patchset works
fine -- no Xorg crashes.  Indeed, it has been playing the dulcet
tones of Pink Floyd through my sound system for the last hour without
a problem.

Example Xorg backtrace follows.  In this case it is a fp exception
but sometimes it is a segfault:

[   307.748] (EE) 
[   307.748] (EE) Backtrace:
[   307.750] (EE) 0: /usr/lib/xorg/Xorg (xorg_backtrace+0x7c) [0x12022b3dc]
[   307.750] (EE) 1: /usr/lib/xorg/Xorg (0x120000000+0x230ae8) [0x120230ae8]
[   307.751] (EE) 2: /usr/lib/alpha-linux-gnu/libc.so.6.1 (0x20000720000+0x49e70) [0x20000769e70]
[   307.753] (EE) 3: /usr/lib/alpha-linux-gnu/libc.so.6.1 (0x20000720000+0x1a02e0) [0x200008c02e0]
[   307.753] (EE) 4: /usr/lib/alpha-linux-gnu/libpixman-1.so.0 (pixman_sample_ceil_y+0xbc) [0x200003472fc]
[   307.755] (EE) 5: /usr/lib/alpha-linux-gnu/libpixman-1.so.0 (pixman_rasterize_trapezoid+0xec) [0x20000347abc]
[   307.755] (EE) 6: /usr/lib/xorg/modules/libglamoregl.so (0x20003d30000+0x6c5bc) [0x20003d9c5bc]
[   307.755] (EE) 7: /usr/lib/xorg/Xorg (CompositeTrapezoids+0xb0) [0x12016a290]
[   307.756] (EE) 8: /usr/lib/xorg/Xorg (0x120000000+0x16fa04) [0x12016fa04]
[   307.758] (EE) 9: /usr/lib/xorg/Xorg (0x120000000+0x16a6c8) [0x12016a6c8]
[   307.758] (EE) 10: /usr/lib/xorg/Xorg (0x120000000+0x58578) [0x120058578]
[   307.758] (EE) 11: /usr/lib/xorg/Xorg (0x120000000+0x5d978) [0x12005d978]
[   307.760] (EE) 12: /usr/lib/xorg/Xorg (0x120000000+0x3f9b8) [0x12003f9b8]
[   307.762] (EE) 13: /usr/lib/alpha-linux-gnu/libc.so.6.1 (0x20000720000+0x2e490) [0x2000074e490]
[   307.763] (EE) 14: /usr/lib/alpha-linux-gnu/libc.so.6.1 (__libc_start_main+0xc4) [0x2000074e5d4]
[   307.763] (EE) 15: /usr/lib/xorg/Xorg (__start+0x38) [0x12003fa08]
[   307.763] (EE) 
[   307.765] (EE) Floating point exception at address 0x200008c02e0
[   307.765] (EE) 
Fatal server error:
[   307.765] (EE) Caught signal 8 (Floating point exception). Server aborting

Cheers,
Michael.