lkml.org 
[lkml]   [2018]   [Mar]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] mm: add config for readahead window
On Fri, 16 Mar 2018 21:51:48 +0000 Wei Wang <wei.vince.wang@gmail.com> wrote:

> On Fri, Mar 16, 2018, 14:33 Andrew Morton <akpm@linux-foundation.org> wrote:
>
> > On Fri, 16 Mar 2018 11:25:08 -0700 Wei Wang <wvw@google.com> wrote:
> >
> > > Change VM_MAX_READAHEAD value from the default 128KB to a configurable
> > > value. This will allow the readahead window to grow to a maximum size
> > > bigger than 128KB during boot, which could benefit to sequential read
> > > throughput and thus boot performance.
> >
> > You can presently run ioctl(BLKRASET) against the block device?
> >
>
> Yeah we are doing tuning in userland after init. But this is something we
> thought could help in very early stage.
>

"thought" and "could" are rather weak! Some impressive performance
numbers for real-world setups would help such a patch along.

\
 
 \ /
  Last update: 2018-03-16 22:59    [W:0.087 / U:3.424 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site