latest 2.2.25 Hibernation patch raises 100% cpu usage

Fri Oct 7 20:07:45 UTC 2016

> On October 7, 2016 at 11:01 PM Harald Leithner <leithner at itronic.at> wrote:
> 
> 
> Hi,
> 
> I use the xi Debian packages, the current 2.2.25 auto 47 build seams to 
> include the commit 351aa01c6e I think this commit cases a 100% cpu 
> usage.
> 
> After some time 1-5 minutes the hibernate process uses 100% and strace 
> floods the screen with:
> 
> epoll_wait(9, {{EPOLLIN|EPOLLHUP, {u32=2609346112, 
> u64=140044312999488}}, {EPOLLIN|EPOLLHUP, {u32=2609364288, 
> u64=140044313017664}}, {EPOLLIN|EPOLLHUP, {u32=2609380304, 
> u64=140044313033680}}}, 34, 164437) = 3
> epoll_wait(9, {{EPOLLIN|EPOLLHUP, {u32=2609346112, 
> u64=140044312999488}}, {EPOLLIN|EPOLLHUP, {u32=2609364288, 
> u64=140044313017664}}, {EPOLLIN|EPOLLHUP, {u32=2609380304, 
> u64=140044313033680}}}, 34, 164437) = 3
> epoll_wait(9, {{EPOLLIN|EPOLLHUP, {u32=2609346112, 
> u64=140044312999488}}, {EPOLLIN|EPOLLHUP, {u32=2609364288, 
> u64=140044313017664}}, {EPOLLIN|EPOLLHUP, {u32=2609380304, 
> u64=140044313033680}}}, 34, 164436) = 3
> epoll_wait(9, {{EPOLLIN|EPOLLHUP, {u32=2609346112, 
> u64=140044312999488}}, {EPOLLIN|EPOLLHUP, {u32=2609364288, 
> u64=140044313017664}}, {EPOLLIN|EPOLLHUP, {u32=2609380304, 
> u64=140044313033680}}}, 34, 164436) = 3
> epoll_wait(9, {{EPOLLIN|EPOLLHUP, {u32=2609346112, 
> u64=140044312999488}}, {EPOLLIN|EPOLLHUP, {u32=2609364288, 
> u64=140044313017664}}, {EPOLLIN|EPOLLHUP, {u32=2609380304, 
> u64=140044313033680}}}, 34, 164436) = 3
> epoll_wait(9, {{EPOLLIN|EPOLLHUP, {u32=2609346112, 
> u64=140044312999488}}, {EPOLLIN|EPOLLHUP, {u32=2609364288, 
> u64=140044313017664}}, {EPOLLIN|EPOLLHUP, {u32=2609380304, 
> u64=140044313033680}}}, 34, 164436) = 3
> epoll_wait(9, {{EPOLLIN|EPOLLHUP, {u32=2609346112, 
> u64=140044312999488}}, {EPOLLIN|EPOLLHUP, {u32=2609364288, 
> u64=140044313017664}}, {EPOLLIN|EPOLLHUP, {u32=2609380304, 
> u64=140044313033680}}}, 34, 164436) = 3
> epoll_wait(9, {{EPOLLIN|EPOLLHUP, {u32=2609346112, 
> u64=140044312999488}}, {EPOLLIN|EPOLLHUP, {u32=2609364288, 
> u64=140044313017664}}, {EPOLLIN|EPOLLHUP, {u32=2609380304, 
> u64=140044313033680}}}, 34, 164436) = 3
> epoll_wait(9, {{EPOLLIN|EPOLLHUP, {u32=2609346112, 
> u64=140044312999488}}, {EPOLLIN|EPOLLHUP, {u32=2609364288, 
> u64=140044313017664}}, {EPOLLIN|EPOLLHUP, {u32=2609380304, 
> u64=140044313033680}}}, 34, 164435) = 3
> 
> Maybe its a client thats incompatible, downgrading to version +46 solve 
> the problem.
> 
> 
> Harald

There is a patch waiting for fixing hibernation. 

Aki