From: Christoph Hellwig <hch@infradead.org>
To: Dave Chinner <david@fromorbit.com>
Cc: linux-xfs@oss.sgi.com, Michael Lueck <mlueck@lueckdatasystems.com>
Subject: Re: Why does xfsdump encounter "WARNING: could not get list of non-root attributes for nondir ino nnnn: Cannot allocate memory (12)"?
Date: Wed, 11 Jan 2012 04:55:14 -0500 [thread overview]
Message-ID: <20120111095513.GA26958@infradead.org> (raw)
In-Reply-To: <20120102213706.GQ23662@dastard>
On Tue, Jan 03, 2012 at 08:37:06AM +1100, Dave Chinner wrote:
> xfs: handle kmalloc failure when reading attrs
>
> From: Dave Chinner <dchinner@redhat.com>
>
> xfsdump uses for a large buffer for extended attributes, which has a
> kmalloc'd shadow buffer in the kernel. This can fail after the
> system has been running for some time as it is a high order
> allocation. Convert this to a vmalloc so that it doesn't require
> contiguous memory and so won't randomly fail while xfsdump is
> running.
I think this should use kmalloc for allocation smaller than a page to
avoid the vmalloc overhead for the usual case of small attributes.
Also the fs/xattr.c code for the normal xattr system calls needs the
same treatment.
_______________________________________________
xfs mailing list
xfs@oss.sgi.com
http://oss.sgi.com/mailman/listinfo/xfs
next prev parent reply other threads:[~2012-01-11 9:55 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-31 21:50 Why does xfsdump encounter "WARNING: could not get list of non-root attributes for nondir ino nnnn: Cannot allocate memory (12)"? Michael Lueck
2012-01-02 21:37 ` Dave Chinner
2012-01-03 3:24 ` Michael Lueck
2012-01-11 9:55 ` Christoph Hellwig [this message]
2012-01-11 10:03 ` Dave Chinner
2012-01-11 10:04 ` Christoph Hellwig
2012-01-11 10:14 ` Dave Chinner
2012-01-11 10:29 ` Christoph Hellwig
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=20120111095513.GA26958@infradead.org \
--to=hch@infradead.org \
--cc=david@fromorbit.com \
--cc=linux-xfs@oss.sgi.com \
--cc=mlueck@lueckdatasystems.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