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SubjectRe: [RFC PATCH 1/5] x86/Kconfig: Add Page Cache Accounting entry
On Wed,  2 Mar 2011 16:38:06 +0800 Liu Yuan wrote:

> From: Liu Yuan <tailai.ly@taobao.com>
>
> Signed-off-by: Liu Yuan <tailai.ly@taobao.com>
> ---
> arch/x86/Kconfig.debug | 9 +++++++++
> 1 files changed, 9 insertions(+), 0 deletions(-)
>
> diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug
> index 615e188..f29e32d 100644
> --- a/arch/x86/Kconfig.debug
> +++ b/arch/x86/Kconfig.debug
> @@ -304,4 +304,13 @@ config DEBUG_STRICT_USER_COPY_CHECKS
>
> If unsure, or if you run an older (pre 4.4) gcc, say N.
>
> +config PAGE_CACHE_ACCT
> + bool "Page cache accounting"
> + ---help---
> + Enabling this options to account for page cache hit/missed number of
> + times. This would allow user space applications get better knowledge
> + of underlying page cache system by reading virtual file. The statitics
> + per partition are collected.
> +
> + If unsure, say N.
> endmenu
> --

rewrite:

Enable this option to provide for page cache hit/miss counters.
This allows userspace applications to obtain better knowledge of the
underlying page cache subsystem by reading a virtual file.
Statistics are collect per partition.

questions:
what virtual file?
what kind of partition?

---
~Randy
*** Remember to use Documentation/SubmitChecklist when testing your code ***


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