Re: Test report for kernel direct mapping performance

2021-01-27 Thread Xing Zhengjun
On 1/26/2021 11:00 PM, Michal Hocko wrote: On Fri 15-01-21 15:23:07, Xing Zhengjun wrote: Hi, There is currently a bit of a debate about the kernel direct map. Does using 2M/1G pages aggressively for the kernel direct map help performance? Or, is it an old optimization which is not as helpfu

Re: Test report for kernel direct mapping performance

2021-01-26 Thread Michal Hocko
On Fri 15-01-21 15:23:07, Xing Zhengjun wrote: > Hi, > > There is currently a bit of a debate about the kernel direct map. Does using > 2M/1G pages aggressively for the kernel direct map help performance? Or, is > it an old optimization which is not as helpful on modern CPUs as it was in > the old