On Fri, 16 Nov 2018 02:51:21 +0000 Mark Rutland [off-list ref] wrote:
Hi Andrew,
On Thu, Nov 15, 2018 at 03:10:48PM -0800, Andrew Morton wrote:
quoted
On Tue, 4 Sep 2018 11:48:25 +0100 Mark Rutland [off-list ref] wrote:
quoted
To minimize repetition, to allow for future rework, and to ensure
regularity of the various atomic APIs, we'd like to automatically
generate (the bulk of) a number of headers related to atomics.
This patch adds the infrastructure to do so, leaving actual conversion
of headers to subsequent patches.
This thing is appallingly slow. `sh scripts/atomic/check-atomics.sh'
takes 8 seconds on a machine which builds an allnoconfig kernel in 30
seconds.
Hmm... on my laptop it's less than half that, and allnoconfig takes ~35s, so
clearly there's a major difference between our setups.
check-atomics.sh is (was) single-threaded, so the relative pain factor
will increase with the number of cores.
For reference, which distro are you using, and what is /bin/sh on your box?
I forget :) - I can't get at that machine from here. Recentish
Ubuntu(ish) on a 12-core.
It seems to be partially fixed in today's linux-next? On this 12-core
Ubuntu 17.10 bash-4.4-5ubuntu1 box the delta is 25.9s -> 27.2s.
But my one-liner remains cruelly unapplied so the build still generates
errors. All that seems to have changed today is that the -EPERM is simply
dropped on the floor rather than terminating the build.