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keyrings.7: Rework 'big_key' text a little 

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
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Michael Kerrisk 2016-12-13 13:48:37 +01:00
parent 23e10faf7b
commit e8722fc5a2
1 changed files with 6 additions and 5 deletions
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man7/keyrings.7
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@ -148,14 +148,15 @@ that should not be readable from user space.
This key type is similar to the
.I """user"""
key type, but it may hold a payload of up to 1 MiB in size.
This key type is useful for tasks such as holding Kerberos ticket caches.
The data may be stored in the swap space rather than in kernel memory
if the data size exceeds the overhead of storing the data encrypted
in swap space
(a tmpfs file is used, which requires filesystem structures
in swap space.
(A tmpfs file is used, which requires filesystem structures
to be allocated in the kernel;
the size of these determines the size threshold
above which the tmpfs storage method is used).
This key type is useful for tasks such as holding Kerberos ticket caches.
The size of these structures determines the size threshold
above which the tmpfs storage method is used.)
.PP
There are more specialized key types available also,
but they aren't discussed here