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| author | Eric Dumazet <edumazet@google.com> | 2014-05-27 10:28:55 -0700 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2014-06-20 21:26:05 +0800 |
| commit | fea435ea9c689a9870450e616b2fce719402b961 (patch) | |
| tree | b32c81389db85c345467832afd428b1c736d11dd /crypto/drbg.c | |
| parent | 9b40a3dd3d4e3ff9904e049f6794c972b603272f (diff) | |
| download | linux-crypto-fea435ea9c689a9870450e616b2fce719402b961.tar.gz linux-crypto-fea435ea9c689a9870450e616b2fce719402b961.zip | |
crypto: lzo - try kmalloc() before vmalloc()
zswap allocates one LZO context per online cpu.
Using vmalloc() for small (16KB) memory areas has drawback of slowing
down /proc/vmallocinfo and /proc/meminfo reads, TLB pressure and poor
NUMA locality, as default NUMA policy at boot time is to interleave
pages :
edumazet:~# grep lzo /proc/vmallocinfo | head -4
0xffffc90006062000-0xffffc90006067000 20480 lzo_init+0x1b/0x30 pages=4 vmalloc N0=2 N1=2
0xffffc90006067000-0xffffc9000606c000 20480 lzo_init+0x1b/0x30 pages=4 vmalloc N0=2 N1=2
0xffffc9000606c000-0xffffc90006071000 20480 lzo_init+0x1b/0x30 pages=4 vmalloc N0=2 N1=2
0xffffc90006071000-0xffffc90006076000 20480 lzo_init+0x1b/0x30 pages=4 vmalloc N0=2 N1=2
This patch tries a regular kmalloc() and fallback to vmalloc in case
memory is too fragmented.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/drbg.c')
0 files changed, 0 insertions, 0 deletions