From: fche@redhat.com (Frank Ch. Eigler)
To: Mathieu Desnoyers <compudj@krystal.dyndns.org>
Cc: michel.dagenais@polymtl.ca, systemtap@sources.redhat.com
Subject: Re: double fault -> PAGE_KERNEL flagged memory
Date: Tue, 22 Nov 2005 15:42:00 -0000 [thread overview]
Message-ID: <y0mu0e4g04e.fsf@tooth.toronto.redhat.com> (raw)
In-Reply-To: <20051122140021.GA3907@Krystal>
Mathieu Desnoyers wrote:
> [...] For Tom : can you flag the RelayFS buffer memory PAGE_KERNEL
> instead of GFP_KERNEL ? Otherwise, it leads to page faults when
> accessing those pages when accessed for the first time (seen with
> LTTng).
FWIW, relayfs is not used by default.
> [...] Make sure that the SystemTAP code is _always_ in contiguous
> memory non swappable to disk :
Is my impression correct that no ordinary kernel-allocated memory such
as .ko .text/.data is swappable? Remember, this is what systemtap
creates, plus a few batches of dynamically allocated (k/vmalloc)
memory during module initialization.
- FChE
next prev parent reply other threads:[~2005-11-22 15:42 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-11-22 1:12 double fault Stone, Joshua I
2005-11-22 1:25 ` Roland McGrath
2005-11-22 9:29 ` Richard J Moore
2005-11-22 14:00 ` double fault -> PAGE_KERNEL flagged memory Mathieu Desnoyers
2005-11-22 15:12 ` Tom Zanussi
2005-11-22 15:24 ` Mathieu Desnoyers
2005-11-22 16:52 ` Tom Zanussi
2005-11-22 18:59 ` Mathieu Desnoyers
2005-11-23 15:13 ` Tom Zanussi
2005-11-23 17:53 ` Mathieu Desnoyers
2005-11-23 20:16 ` Tom Zanussi
2005-11-23 21:00 ` Frank Ch. Eigler
2005-11-23 21:51 ` Roland McGrath
2005-11-23 21:56 ` Mathieu Desnoyers
2005-11-23 22:34 ` Roland McGrath
2005-11-23 22:44 ` Mathieu Desnoyers
2005-11-23 23:20 ` Tom Zanussi
2005-11-24 18:10 ` Frank Ch. Eigler
2005-11-24 22:09 ` Roland McGrath
2005-11-23 22:18 ` Tom Zanussi
2005-11-23 22:25 ` Frank Ch. Eigler
2005-11-23 23:21 ` Mathieu Desnoyers
2005-11-22 15:17 ` Mathieu Desnoyers
2005-11-22 15:42 ` Frank Ch. Eigler [this message]
2005-11-22 16:01 ` Mathieu Desnoyers
2005-11-23 8:34 ` double fault Martin Hunt
2005-11-23 17:21 ` Mathieu Desnoyers
2005-11-23 17:54 ` Martin Hunt
2005-11-23 18:09 ` Mathieu Desnoyers
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=y0mu0e4g04e.fsf@tooth.toronto.redhat.com \
--to=fche@redhat.com \
--cc=compudj@krystal.dyndns.org \
--cc=michel.dagenais@polymtl.ca \
--cc=systemtap@sources.redhat.com \
/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 read-only IMAP folder(s) and NNTP newsgroup(s).