Mikulas Patocka
0f5d8e6ee7
dm crypt: add 'submit_from_crypt_cpus' option
...
Make it possible to disable offloading writes by setting the optional
'submit_from_crypt_cpus' table argument.
There are some situations where offloading write bios from the
encryption threads to a single thread degrades performance
significantly.
The default is to offload write bios to the same thread because it
benefits CFQ to have writes submitted using the same IO context.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com >
Signed-off-by: Mike Snitzer <snitzer@redhat.com >
2015-02-16 11:11:15 -05:00
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