On 2015-07-15 02:43, Pavel Machek wrote:
How expensive it is can vary widely, but it pretty much boils down to how much dirty data still needs written out, and how slow the storage it needs written to is. There's not really much that can be done in the kernel to change this, and most userspace suspend systems call sync themselves during the suspend sequence.On Tue 2015-07-14 22:24:51, Len Brown wrote:From: Len Brown <len.br...@intel.com>The Linux kernel suspend path has traditionally invoked sys_sync(). But sys_sync() can be expensive, and some systems do not want to pay the cost of sys_sync() on every suspend.Have you measured how expesive it can be, and why it is expensive?
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