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author | Ingo Molnar <mingo@kernel.org> | 2021-12-13 10:48:46 +0100 |
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committer | Ingo Molnar <mingo@kernel.org> | 2021-12-13 10:48:46 +0100 |
commit | 6773cc31a9bb5122fd5c288f73ca006ad20a6c17 (patch) | |
tree | 730ec8bcc0a5ddd5030268bb3ffd4945d34728c1 /include/uapi/linux/resource.h | |
parent | futex: Fix additional regressions (diff) | |
parent | Linux 5.16-rc5 (diff) | |
download | linux-dev-6773cc31a9bb5122fd5c288f73ca006ad20a6c17.tar.xz linux-dev-6773cc31a9bb5122fd5c288f73ca006ad20a6c17.zip |
Merge tag 'v5.16-rc5' into locking/core, to pick up fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/uapi/linux/resource.h')
-rw-r--r-- | include/uapi/linux/resource.h | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/include/uapi/linux/resource.h b/include/uapi/linux/resource.h index 74ef57b38f9f..ac5d6a3031db 100644 --- a/include/uapi/linux/resource.h +++ b/include/uapi/linux/resource.h @@ -66,10 +66,17 @@ struct rlimit64 { #define _STK_LIM (8*1024*1024) /* - * GPG2 wants 64kB of mlocked memory, to make sure pass phrases - * and other sensitive information are never written to disk. + * Limit the amount of locked memory by some sane default: + * root can always increase this limit if needed. + * + * The main use-cases are (1) preventing sensitive memory + * from being swapped; (2) real-time operations; (3) via + * IOURING_REGISTER_BUFFERS. + * + * The first two don't need much. The latter will take as + * much as it can get. 8MB is a reasonably sane default. */ -#define MLOCK_LIMIT ((PAGE_SIZE > 64*1024) ? PAGE_SIZE : 64*1024) +#define MLOCK_LIMIT (8*1024*1024) /* * Due to binary compatibility, the actual resource numbers |