On 03/17/2014 07:37 AM, Madper Xie wrote:
Raghavendra K T writes:
On 02/18/2014 03:19 PM, Jan Kara wrote:
On Tue 18-02-14 12:55:38, Raghavendra K T wrote:
Hi. Just a concern. Will the performance reduce on some special storage
backend? E.g. tape.
The existent applications may using readahea
Raghavendra K T writes:
> On 02/18/2014 03:19 PM, Jan Kara wrote:
>> On Tue 18-02-14 12:55:38, Raghavendra K T wrote:
>>> Currently max_sane_readahead() returns zero on the cpu having no local
>>> memory node
>>> which leads to readahead failure. Fix the readahead failure by returning
>>> minim
On Tue, 18 Feb 2014, Andrew Morton wrote:
> > I'm not sure I understand why we want to be independent of PAGE_SIZE since
> > we're still relying on PAGE_CACHE_SIZE. Don't you mean to do
> >
> > #define MAX_READAHEAD ((512*PAGE_SIZE)/PAGE_CACHE_SIZE)
>
> MAX_READAHEAD is in units of "page
On Tue, 18 Feb 2014 14:23:44 -0800 (PST) David Rientjes
wrote:
> On Tue, 18 Feb 2014, Raghavendra K T wrote:
>
> > Currently max_sane_readahead() returns zero on the cpu having no local
> > memory node
> > which leads to readahead failure. Fix the readahead failure by returning
> > minimum of
On Tue, 18 Feb 2014, Raghavendra K T wrote:
> Currently max_sane_readahead() returns zero on the cpu having no local memory
> node
> which leads to readahead failure. Fix the readahead failure by returning
> minimum of (requested pages, 512). Users running application on a memory-less
> cpu
> wh
On Tue 18-02-14 17:34:54, Raghavendra K T wrote:
> On 02/18/2014 03:19 PM, Jan Kara wrote:
> >On Tue 18-02-14 12:55:38, Raghavendra K T wrote:
> >>Currently max_sane_readahead() returns zero on the cpu having no local
> >>memory node
> >>which leads to readahead failure. Fix the readahead failure
On 02/18/2014 03:19 PM, Jan Kara wrote:
On Tue 18-02-14 12:55:38, Raghavendra K T wrote:
Currently max_sane_readahead() returns zero on the cpu having no local memory
node
which leads to readahead failure. Fix the readahead failure by returning
minimum of (requested pages, 512). Users running a
On Tue 18-02-14 12:55:38, Raghavendra K T wrote:
> Currently max_sane_readahead() returns zero on the cpu having no local memory
> node
> which leads to readahead failure. Fix the readahead failure by returning
> minimum of (requested pages, 512). Users running application on a memory-less
> cpu
Currently max_sane_readahead() returns zero on the cpu having no local memory
node
which leads to readahead failure. Fix the readahead failure by returning
minimum of (requested pages, 512). Users running application on a memory-less
cpu
which needs readahead such as streaming application see con
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