[PATCH] crypto: allow to assign gfp_t for __crypto_alloc_tfm
From: herbert@gondor.apana.org.au (Herbert Xu)
Date: 2015-05-19 06:32:21
Also in:
linux-crypto, linux-ext4, linux-f2fs-devel, lkml
On Mon, May 18, 2015 at 11:24:30PM -0700, Jaegeuk Kim wrote:
The call path in fs/ext4/crypto.c is:
- writepage
- ext4_encrypt
- ext4_get_crypto_ctx
- crypto_alloc_ablkcipher
AFAIK, this way can achieve to reduce memory footprint gracefully.
Just before submitting bios, fs allocates the required memory, and then end_io
will free them in pair.So where does the key get generated? The crypto tfm should be allocated when you generate the key. Cheers, -- Email: Herbert Xu [off-list ref] Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt