linux-kernel - Re: [RFC][PATCH 00/11] track files for checkpointability

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20090310122320.313491ce@thinkcentre.lan>
Date:	Tue, 10 Mar 2009 12:23:20 -0500
From:	Nathan Lynch <ntl@...ox.com>
To:	"Serge E. Hallyn" <serue@...ibm.com>
Cc:	Dave Hansen <dave@...ux.vnet.ibm.com>,
	containers <containers@...ts.linux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Christoph Hellwig <hch@...radead.org>,
	Ingo Molnar <mingo@...e.hu>,
	Alexey Dobriyan <adobriyan@...il.com>
Subject: Re: [RFC][PATCH 00/11] track files for checkpointability

"Serge E. Hallyn" <serue@...ibm.com> wrote:
> Quoting Nathan Lynch (ntl@...ox.com):
> > Please consider this and a following patch.
> > 
> > >From a0fb96aa41c4d360559013cfd7f32f07f449c1c4 Mon Sep 17 00:00:00 2001
> > From: Nathan Lynch <ntl@...ox.com>
> > Date: Mon, 9 Mar 2009 22:23:02 -0500
> > Subject: [PATCH] checkpoint: make files_deny_checkpointing print task name and pid
> > 
> > This lets the developer know *which* task performed an action that
> > prevents checkpoint.
> > 
> > 
> > Signed-off-by: Nathan Lynch <ntl@...ox.com>
> > ---
> >  fs/file.c                  |    2 +-
> >  fs/open.c                  |    2 +-
> >  include/linux/checkpoint.h |   13 +++++++------
> >  3 files changed, 9 insertions(+), 8 deletions(-)
> > 
> > diff --git a/fs/file.c b/fs/file.c
> > index 0501af6..fcb2803 100644
> > --- a/fs/file.c
> > +++ b/fs/file.c
> > @@ -299,7 +299,7 @@ static void __scan_files_for_cr(struct files_struct *files)
> >  			continue;
> >  		if (cr_file_supported(f))
> >  			continue;
> > -		files_deny_checkpointing(files);
> > +		files_deny_checkpointing(current, files);
> 
> Ah but you can't do this, because __scan_files_for_cr is called
> from dupfd which is called during copy_files, right?

Are you saying that the message should identify the child instead of
the parent as the uncheckpointable task?

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/