Re: [PATCH v2 0/5] mm: support parallel free of memory

[Alex Thorlton]

On Wed, Mar 15, 2017 at 04:59:59PM +0800, Aaron Lu wrote:
> v2 changes: Nothing major, only minor ones.
>  - rebased on top of v4.11-rc2-mmotm-2017-03-14-15-41;
>  - use list_add_tail instead of list_add to add worker to tlb's worker
>    list so that when doing flush, the first queued worker gets flushed
>    first(based on the comsumption that the first queued worker has a
>    better chance of finishing its job than those later queued workers);
>  - use bool instead of int for variable free_batch_page in function
>    tlb_flush_mmu_free_batches;
>  - style change according to ./scripts/checkpatch;
>  - reword some of the changelogs to make it more readable.
> 
> v1 is here:
> https://lkml.org/lkml/2017/2/24/245

I tested v1 on a Haswell system with 64 sockets/1024 cores/2048 threads
and 8TB of RAM, with a 1TB malloc.  The average free() time for a 1TB
malloc on a vanilla kernel was 41.69s, the patched kernel averaged
21.56s for the same test.

I am testing v2 now and will report back with results in the next day or
so.

- Alex