Hi Dave,
>
> Eek. There really doesn't appear to be a place in Documentation/ that
> we've documented vmstat entries.
>
> Maybe you can start:
>
> Documentation/admin-guide/mm/vmstat.rst
>
I was also very surprised that there does not exist documentation for
vmstat, that lead me to add a
Hi Mathew,
> Is this tracing of userspace programs causing splits, or is it kernel
> tracing? Also, we have lots of kinds of tracing these days; are you
> referring to kprobes? tracepoints? ftrace? Something else?
It has to be kernel tracing (kprobes, tracepoints) as we are dealing with
dire
> On Jan 28, 2021, at 8:33 AM, Zi Yan wrote:
>
> On 28 Jan 2021, at 5:49, Saravanan D wrote:
>
>> To help with debugging the sluggishness caused by TLB miss/reload,
>> we introduce monotonic lifetime hugepage split event counts since
>> system state: SYSTEM_RUNNING to be displayed as part of
>
On 28 Jan 2021, at 11:41, Dave Hansen wrote:
> On 1/28/21 8:33 AM, Zi Yan wrote:
>>> One of the many lasting (as we don't coalesce back) sources for
>>> huge page splits is tracing as the granular page
>>> attribute/permission changes would force the kernel to split code
>>> segments mapped to hug
On 1/28/21 8:33 AM, Zi Yan wrote:
>> One of the many lasting (as we don't coalesce back) sources for
>> huge page splits is tracing as the granular page
>> attribute/permission changes would force the kernel to split code
>> segments mapped to huge pages to smaller ones thereby increasing
>> the pr
On 28 Jan 2021, at 5:49, Saravanan D wrote:
> To help with debugging the sluggishness caused by TLB miss/reload,
> we introduce monotonic lifetime hugepage split event counts since
> system state: SYSTEM_RUNNING to be displayed as part of
> /proc/vmstat in x86 servers
>
> The lifetime split event
On Thu, Jan 28, 2021 at 02:49:34AM -0800, Saravanan D wrote:
> One of the many lasting (as we don't coalesce back) sources for huge page
> splits is tracing as the granular page attribute/permission changes would
> force the kernel to split code segments mapped to huge pages to smaller
> ones there
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