Re: Problems with swapping in v4.5-rc on POWER

On Mon, 7 Mar 2016, Michael Ellerman wrote: > On Fri, 2016-03-04 at 09:58 -0800, Hugh Dickins wrote: > > > > The alternative bisection was as unsatisfactory as the first: > > again it fingered an irrelevant merge (rather than any commit > > pulled in by that merge) as the bad commit. > > > > It

Re: Problems with swapping in v4.5-rc on POWER

On Fri, 2016-03-04 at 09:58 -0800, Hugh Dickins wrote: > > The alternative bisection was as unsatisfactory as the first: > again it fingered an irrelevant merge (rather than any commit > pulled in by that merge) as the bad commit. > > It seems this issue is too intermittent for bisection to be

Re: Problems with swapping in v4.5-rc on POWER

On Thu, 3 Mar 2016, Michael Ellerman wrote: > On Wed, 2016-03-02 at 12:49 -0800, Hugh Dickins wrote: > > On Fri, 26 Feb 2016, Hugh Dickins wrote: > > > On Thu, 25 Feb 2016, Hugh Dickins wrote: > > > > On Wed, 24 Feb 2016, Hugh Dickins wrote: > > > > > On Thu, 25 Feb 2016, Aneesh Kumar K.V wrote: >

Re: Problems with swapping in v4.5-rc on POWER

On Wed, 2016-03-02 at 12:49 -0800, Hugh Dickins wrote: > On Fri, 26 Feb 2016, Hugh Dickins wrote: > > On Thu, 25 Feb 2016, Hugh Dickins wrote: > > > On Wed, 24 Feb 2016, Hugh Dickins wrote: > > > > On Thu, 25 Feb 2016, Aneesh Kumar K.V wrote: > > > > > > > > > > Can you test the impact of the

Re: Problems with swapping in v4.5-rc on POWER

On Fri, 26 Feb 2016, Hugh Dickins wrote: > On Thu, 25 Feb 2016, Hugh Dickins wrote: > > On Wed, 24 Feb 2016, Hugh Dickins wrote: > > > On Thu, 25 Feb 2016, Aneesh Kumar K.V wrote: > > > > > > > > Can you test the impact of the merge listed below ?(ie, revert the > > > > merge and see if > > > >

Re: Problems with swapping in v4.5-rc on POWER

On Thu, 25 Feb 2016, Hugh Dickins wrote: > On Wed, 24 Feb 2016, Hugh Dickins wrote: > > On Thu, 25 Feb 2016, Aneesh Kumar K.V wrote: > > > > > > Can you test the impact of the merge listed below ?(ie, revert the merge > > > and see if > > > we can reproduce and also verify with merge applied).

Re: Problems with swapping in v4.5-rc on POWER

On Wed, 24 Feb 2016, Hugh Dickins wrote: > On Thu, 25 Feb 2016, Aneesh Kumar K.V wrote: > > > > Can you test the impact of the merge listed below ?(ie, revert the merge > > and see if > > we can reproduce and also verify with merge applied). This will give us a > > set of commits to look closer.

Re: Problems with swapping in v4.5-rc on POWER

On Thu, 25 Feb 2016, Aneesh Kumar K.V wrote: > > Can you test the impact of the merge listed below ?(ie, revert the merge and > see if > we can reproduce and also verify with merge applied). This will give us a > set of commits to look closer. We had quiet a lot of page table > related changes

Re: Problems with swapping in v4.5-rc on POWER

On Thu, 25 Feb 2016, Michael Ellerman wrote: > > I do run tests on G5, but obviously not rigorously enough. I kicked off a few > kernel builds on mine and it survived, though once it hits swap it's almost > unusably slow. I'll leave it running overnight and see if I hit anything. Oh yes, I'd

Re: Problems with swapping in v4.5-rc on POWER

Hugh Dickins writes: > I've plagiarized the subject from Paulus's "Problems with THP" mail > last weekend; but my similar problems are on PowerMac G5 baremetal, > with 4kB pages, not capable of THP and no THP configured in. > > Under heavily swapping load, running kernel builds

Re: Problems with swapping in v4.5-rc on POWER

On Wed, 2016-02-24 at 18:10 -0800, Hugh Dickins via Linuxppc-dev wrote: > I've plagiarized the subject from Paulus's "Problems with THP" mail > last weekend; but my similar problems are on PowerMac G5 baremetal, > with 4kB pages, not capable of THP and no THP configured in. > > Under heavily

Problems with swapping in v4.5-rc on POWER

I've plagiarized the subject from Paulus's "Problems with THP" mail last weekend; but my similar problems are on PowerMac G5 baremetal, with 4kB pages, not capable of THP and no THP configured in. Under heavily swapping load, running kernel builds on tmpfs in limited memory, I've been seeing