tree 2eb73358dc9ad58dce32dd40ceb0fbc938d915d4
parent 0d555ecfa468f6dc29697829844f2f79909e376f
author Ed Cashin <ecashin@coraid.com> 1355789029 -0800
committer Linus Torvalds <torvalds@linux-foundation.org> 1355793324 -0800

aoe: use high-resolution RTTs with fallback to low-res

These changes improve the accuracy of the decision about whether it's time
to retransmit an AoE command by using the microsecond-resolution
gettimeofday instead of jiffies.

Because the system time can jump suddenly, the decision reverts to using
jiffies if the high-resolution time difference is relatively large.
Otherwise the AoE targets could be considered failed inappropriately.

Signed-off-by: Ed Cashin <ecashin@coraid.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>