linux-mm.kvack.org archive mirror
 help / color / mirror / Atom feed
From: Vasilis Dimitsas <vdimitsas@gmail.com>
To: linux-mm@kvack.org
Subject: asynchronous readahead prefetcher operation
Date: Wed, 12 Jul 2017 23:31:21 +0300	[thread overview]
Message-ID: <CAE=wTWYU8F5KDrC9VSxrtckVZ2xmvxy8owxCkZUcY4KXEiz0Og@mail.gmail.com> (raw)

[-- Attachment #1: Type: text/plain, Size: 684 bytes --]

Good evening,

I am currently working on a project which is related to the operation of
the linux readahead prefetcher. As a result, I am trying to understand its
operation. Having read thoroughly the relevant part in the kernel code, I
realize, from the comments, that part of the prefetching occurs
asynchronously. The problem is that I can not verify this from the code.

Even if you call page_cache_sync_readahead() or
page_cache_async_readahead(), then both will end up in ra_submit(), in
which, the operation is common for both cases.

So, please could you tell me at which point does the operation of
prefetching occurs asynchronously?

Thank you in advance,

Vasilis Dimitsas

[-- Attachment #2: Type: text/html, Size: 829 bytes --]

             reply	other threads:[~2017-07-12 20:32 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-07-12 20:31 Vasilis Dimitsas [this message]
2017-07-13 16:34 ` asynchronous readahead prefetcher operation Matthew Wilcox
2017-07-13 20:36   ` Vasilis Dimitsas
2017-07-14  1:55     ` Matthew Wilcox

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to='CAE=wTWYU8F5KDrC9VSxrtckVZ2xmvxy8owxCkZUcY4KXEiz0Og@mail.gmail.com' \
    --to=vdimitsas@gmail.com \
    --cc=linux-mm@kvack.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).