From: David Vrabel <david.vrabel@citrix.com>
To: Boris Ostrovsky <boris.ostrovsky@oracle.com>,
konrad.wilk@oracle.com, david.vrabel@citrix.com
Cc: xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] xen/gntdev: Don't allocate struct gntdev_copy_batch on stack
Date: Mon, 18 Jan 2016 11:11:06 +0000 [thread overview]
Message-ID: <569CC84A.1000401__9130.08395950801$1453115545$gmane$org@citrix.com> (raw)
In-Reply-To: <1452887025-27285-1-git-send-email-boris.ostrovsky@oracle.com>
On 15/01/16 19:43, Boris Ostrovsky wrote:
> struct gntdev_copy_batch is over 1300 bytes in size, we shouldn't
> put it on stack.
>
> Some compilers (e.g. 5.2.1) complain:
> drivers/xen/gntdev.c: In function ‘gntdev_ioctl_grant_copy.isra.5’:
> drivers/xen/gntdev.c:949:1: warning: the frame size of 1416 bytes
> is larger than 1024 bytes [-Wframe-larger-than=]
I thought I'd already reduced the size of this enough (from a batch size
of 32 to 24) but this obviously isn't enough for 64-bit platforms.
In the absence of any performance data on the best approach I would
prefer just reducing the batch size to 16.
David
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xen.org
http://lists.xen.org/xen-devel
next prev parent reply other threads:[~2016-01-18 11:11 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-15 19:43 [PATCH] xen/gntdev: Don't allocate struct gntdev_copy_batch on stack Boris Ostrovsky
2016-01-15 19:50 ` [Xen-devel] " Andrew Cooper
2016-01-15 19:53 ` Boris Ostrovsky
2016-01-15 19:53 ` [Xen-devel] " Boris Ostrovsky
2016-01-15 19:50 ` Andrew Cooper
2016-01-18 11:11 ` [Xen-devel] " David Vrabel
2016-01-19 14:26 ` Boris Ostrovsky
2016-01-19 14:26 ` [Xen-devel] " Boris Ostrovsky
2016-01-19 14:31 ` David Vrabel
2016-01-19 14:31 ` [Xen-devel] " David Vrabel
2016-01-18 11:11 ` David Vrabel [this message]
2016-01-15 19:43 Boris Ostrovsky
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='569CC84A.1000401__9130.08395950801$1453115545$gmane$org@citrix.com' \
--to=david.vrabel@citrix.com \
--cc=boris.ostrovsky@oracle.com \
--cc=konrad.wilk@oracle.com \
--cc=linux-kernel@vger.kernel.org \
--cc=xen-devel@lists.xenproject.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.