linux-kernel - unaligned accesses in SLAB etc.

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Message-Id: <20141011.221510.1574777235900788349.davem@davemloft.net>
Date:	Sat, 11 Oct 2014 22:15:10 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	linux-kernel@...r.kernel.org
CC:	cl@...ux.com, penberg@...nel.org, rientjes@...gle.com,
	iamjoonsoo.kim@....com, akpm@...ux-foundation.org,
	linux-mm@...ck.org
Subject: unaligned accesses in SLAB etc.


I'm getting tons of the following on sparc64:

[603965.383447] Kernel unaligned access at TPC[546b58] free_block+0x98/0x1a0
[603965.396987] Kernel unaligned access at TPC[546b60] free_block+0xa0/0x1a0
[603965.410523] Kernel unaligned access at TPC[546b58] free_block+0x98/0x1a0
[603965.424061] Kernel unaligned access at TPC[546b60] free_block+0xa0/0x1a0
[603965.437617] Kernel unaligned access at TPC[546b58] free_block+0x98/0x1a0
[603970.554394] log_unaligned: 333 callbacks suppressed
[603970.564041] Kernel unaligned access at TPC[546b58] free_block+0x98/0x1a0
[603970.577576] Kernel unaligned access at TPC[546b60] free_block+0xa0/0x1a0
[603970.591122] Kernel unaligned access at TPC[546b58] free_block+0x98/0x1a0
[603970.604669] Kernel unaligned access at TPC[546b60] free_block+0xa0/0x1a0
[603970.618216] Kernel unaligned access at TPC[546b58] free_block+0x98/0x1a0
[603976.515633] log_unaligned: 31 callbacks suppressed
[603976.525092] Kernel unaligned access at TPC[548080] cache_alloc_refill+0x180/0x3a0
[603976.540196] Kernel unaligned access at TPC[548080] cache_alloc_refill+0x180/0x3a0
[603976.555308] Kernel unaligned access at TPC[548080] cache_alloc_refill+0x180/0x3a0
[603976.570411] Kernel unaligned access at TPC[548080] cache_alloc_refill+0x180/0x3a0
[603976.585526] Kernel unaligned access at TPC[548080] cache_alloc_refill+0x180/0x3a0
[603982.476424] log_unaligned: 43 callbacks suppressed
[603982.485881] Kernel unaligned access at TPC[549378] kmem_cache_alloc+0xd8/0x1e0
[603982.501590] Kernel unaligned access at TPC[5470a8] kmem_cache_free+0xc8/0x200
[603982.501605] Kernel unaligned access at TPC[549378] kmem_cache_alloc+0xd8/0x1e0
[603982.530382] Kernel unaligned access at TPC[5470a8] kmem_cache_free+0xc8/0x200
[603982.544820] Kernel unaligned access at TPC[549378] kmem_cache_alloc+0xd8/0x1e0
[603987.567130] log_unaligned: 11 callbacks suppressed
[603987.576582] Kernel unaligned access at TPC[548080] cache_alloc_refill+0x180/0x3a0
[603987.591696] Kernel unaligned access at TPC[548080] cache_alloc_refill+0x180/0x3a0
[603987.606811] Kernel unaligned access at TPC[548080] cache_alloc_refill+0x180/0x3a0
[603987.621904] Kernel unaligned access at TPC[548080] cache_alloc_refill+0x180/0x3a0
[603987.637017] Kernel unaligned access at TPC[548080] cache_alloc_refill+0x180/0x3a0
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