Messages in this thread | | | From | Weedy <> | Date | Sun, 4 Jul 2010 15:00:21 -0400 | Subject | Re: Entropy poolsize |
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On Tue, Jun 22, 2010 at 7:21 PM, Weedy <weedy2887@gmail.com> wrote: > Man I need to remember to hit reply-to-all > > On Mon, Jun 21, 2010 at 3:56 PM, Randy Dunlap <randy.dunlap@oracle.com> wrote: >> On 06/21/10 12:48, Weedy wrote: >>> On Mon, Jun 21, 2010 at 11:51 AM, Randy Dunlap <randy.dunlap@oracle.com> wrote: >>>> On Mon, 21 Jun 2010 09:58:16 -0400 Weedy wrote: >>>> >>>>> I know grsecurity has a option for this but I don't want to patch my >>>>> kernel with it at this time. I have been poking around random.c but I >>>>> can't seem to figure out where .poolsize is assigned it's value and >>>>> how to increase it. >>>>> >>>>> If someone could point it out that would be nice. >>>>> >>>>> Thank you for your time. >>>>> -- >>>> >>>> Do you mean this one in drivers/char/random.c or something else? >>>> >>>> static int sysctl_poolsize = INPUT_POOL_WORDS * 32; >>>> >>>> It's a sysctl, so it is tunable. >>> It's locked, some kind of security risk many kernels ago. I'll try >>> changing that but I thought I tried it once before. >> >> Ah, it's mode is 0444 (read-only). Sorry I missed that piece. >> Sure, you could change the mode for your own use (rebuild the kernel). > > # cat /proc/sys/kernel/random/poolsize > 16384 > cat /proc/sys/kernel/random/entropy_avail > 4096 > > I guess there is more to it. >
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