Re: [PATCHv4 0/4] ARM: Fixing udelay() for SMP and non-SMP systems

2011-03-04 Thread Linus Walleij
2010/12/20 Stephen Boyd sb...@codeaurora.org: These patches fix the udelay() issue pointed out on arm-lkml[1][2]. A quick recap: some SMP machines can scale their CPU frequencies independent of one another. loops_per_jiffy is calibrated globally and used in __const_udelay(). If one CPU is

Re: [PATCHv4 0/4] ARM: Fixing udelay() for SMP and non-SMP systems

2011-03-04 Thread Saravana Kannan
On 03/04/2011 02:10 AM, Linus Walleij wrote: 2010/12/20 Stephen Boydsb...@codeaurora.org: These patches fix the udelay() issue pointed out on arm-lkml[1][2]. A quick recap: some SMP machines can scale their CPU frequencies independent of one another. loops_per_jiffy is calibrated globally and

[PATCHv4 0/4] ARM: Fixing udelay() for SMP and non-SMP systems

2010-12-20 Thread Stephen Boyd
These patches fix the udelay() issue pointed out on arm-lkml[1][2]. A quick recap: some SMP machines can scale their CPU frequencies independent of one another. loops_per_jiffy is calibrated globally and used in __const_udelay(). If one CPU is running faster than what the loops_per_jiffy is