Re: possible performance issue in 4-level page tables

Zou Nan hai wrote: There is a performance regression of lmbench lat_proc fork result on ia64. in 2.6.10 I got Process fork+exit:164.8438 microseconds. in 2.6.11-rc2 Process fork+exit:183.8621 microseconds. I believe this regression was caused by the 4-level page tables change. Since most of

possible performance issue in 4-level page tables

There is a performance regression of lmbench lat_proc fork result on ia64. in 2.6.10 I got Process fork+exit:164.8438 microseconds. in 2.6.11-rc2 Process fork+exit:183.8621 microseconds. I believe this regression was caused by the 4-level page tables change. Since most of the kernel time