Re: powerpc/pseries: Use H_CLEAR_HPT to clear MMU hash table during kexec

2016-11-14 Thread Michael Ellerman
On Sat, 2016-01-10 at 10:41:56 UTC, Anton Blanchard wrote: > From: Anton Blanchard > > An hcall was recently added that does exactly what we need > during kexec - it clears the entire MMU hash table, ignoring any > VRMA mappings. > > Try it and fall back to the old method if we get a failure. >

Re: [PATCH] powerpc/pseries: Use H_CLEAR_HPT to clear MMU hash table during kexec

2016-10-26 Thread Mahesh Jagannath Salgaonkar
On 10/01/2016 04:11 PM, Anton Blanchard wrote: > From: Anton Blanchard > > An hcall was recently added that does exactly what we need > during kexec - it clears the entire MMU hash table, ignoring any > VRMA mappings. > > Try it and fall back to the old method if we get a failure. > > On a POWE

[PATCH] powerpc/pseries: Use H_CLEAR_HPT to clear MMU hash table during kexec

2016-10-01 Thread Anton Blanchard
From: Anton Blanchard An hcall was recently added that does exactly what we need during kexec - it clears the entire MMU hash table, ignoring any VRMA mappings. Try it and fall back to the old method if we get a failure. On a POWER8 box with 5TB of memory, this reduces the time it takes to kexe