ca53b8f1b4
When CONFIG_KASAN_HW_TAGS is enabled we currently increase the minimum slab alignment to 16. This happens even if MTE is not supported in hardware or disabled via kasan=off, which creates an unnecessary memory overhead in those cases. Eliminate this overhead by making the minimum slab alignment a runtime property and only aligning to 16 if KASAN is enabled at runtime. On a DragonBoard 845c (non-MTE hardware) with a kernel built with CONFIG_KASAN_HW_TAGS, waiting for quiescence after a full Android boot I see the following Slab measurements in /proc/meminfo (median of 3 reboots): Before: 169020 kB After: 167304 kB [akpm@linux-foundation.org: make slab alignment type `unsigned int' to avoid casting] Link: https://linux-review.googlesource.com/id/I752e725179b43b144153f4b6f584ceb646473ead Link: https://lkml.kernel.org/r/20220427195820.1716975-2-pcc@google.com Signed-off-by: Peter Collingbourne <pcc@google.com> Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com> Reviewed-by: Hyeonggon Yoo <42.hyeyoo@gmail.com> Tested-by: Hyeonggon Yoo <42.hyeyoo@gmail.com> Acked-by: David Rientjes <rientjes@google.com> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Pekka Enberg <penberg@kernel.org> Cc: Roman Gushchin <roman.gushchin@linux.dev> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com> Cc: Alexander Potapenko <glider@google.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Kees Cook <keescook@chromium.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Bug: 265364138 (cherry picked from commit d949a8155d139aa890795b802004a196b7f00598) [Zhenhua: fold 587cfd8e66df3515 ("ANDROID: fix alignment of struct shash_desc member") into this change, to keep ABI compatibility] Change-Id: I3749f8de65ef3619724e68a9affb4eefd1ebe737 Signed-off-by: Jaewon Kim <jaewon31.kim@samsung.com> Signed-off-by: Zhenhua Huang <quic_zhenhuah@quicinc.com> |
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| .. | ||
| internal | ||
| acompress.h | ||
| aead.h | ||
| aes.h | ||
| akcipher.h | ||
| algapi.h | ||
| arc4.h | ||
| asym_tpm_subtype.h | ||
| authenc.h | ||
| b128ops.h | ||
| blake2b.h | ||
| blake2s.h | ||
| blowfish.h | ||
| cast5.h | ||
| cast6.h | ||
| cast_common.h | ||
| chacha.h | ||
| chacha20poly1305.h | ||
| cryptd.h | ||
| ctr.h | ||
| curve25519.h | ||
| des.h | ||
| dh.h | ||
| drbg.h | ||
| ecdh.h | ||
| engine.h | ||
| gcm.h | ||
| gf128mul.h | ||
| ghash.h | ||
| hash.h | ||
| hash_info.h | ||
| hmac.h | ||
| if_alg.h | ||
| kpp.h | ||
| md5.h | ||
| nhpoly1305.h | ||
| null.h | ||
| padlock.h | ||
| pcrypt.h | ||
| pkcs7.h | ||
| poly1305.h | ||
| public_key.h | ||
| rng.h | ||
| scatterwalk.h | ||
| serpent.h | ||
| sha.h | ||
| sha1_base.h | ||
| sha3.h | ||
| sha256_base.h | ||
| sha512_base.h | ||
| skcipher.h | ||
| sm2.h | ||
| sm3.h | ||
| sm3_base.h | ||
| sm4.h | ||
| streebog.h | ||
| twofish.h | ||
| xts.h | ||