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On 08/20/2014 11:41 PM, Michael Ellerman wrote:
> On Wed, 2014-08-13 at 14:48 +0530, Himangi Saraogi wrote:
>> Continue is not needed at the bottom of a loop.
>
> True.
>
> I wonder though, is the code trying to continue to the outer loop?
> I st
; Signed-off-by: Nathan Fontenot
Nathan, sorry I didn't take care of this before I gave up
r...@linux.ibm.com.
Acked-by: Robert Jennings
> --- MAINTAINERS | 16 +++- 1 file changed, 11
> insertions(+), 5 deletions(-)
>
From: Robert C Jennings
Introduce use of the unused SPLICE_F_MOVE flag for vmsplice to zap
pages.
When vmsplice is called with flags (SPLICE_F_GIFT | SPLICE_F_MOVE) the
writer's gift'ed pages would be zapped. This patch supports further work
to move vmsplice'd pages rather than copying them. T
From: Robert C Jennings
This patch set would add the ability to move anonymous user pages from one
process to another through vmsplice without copying data. Moving pages
rather than copying is implemented for a narrow case in this RFC to meet
the needs of QEMU's usage (below).
Among the restric
From: Robert C Jennings
It is sometimes useful to move anonymous pages over a pipe rather than
save/swap them. Check the SPLICE_F_GIFT and SPLICE_F_MOVE flags to see
if userspace would like to move such pages. This differs from plain
SPLICE_F_GIFT in that the memory written to the pipe will no lo
* Vlastimil Babka (vba...@suse.cz) wrote:
> On 10/07/2013 10:21 PM, Robert C Jennings wrote:
> > From: Matt Helsley
> >
> > It is sometimes useful to move anonymous pages over a pipe rather than
> > save/swap them. Check the SPLICE_F_GIFT and SPLICE_F_MOVE flags to see
> > if userspace would like
* Dave Hansen (d...@sr71.net) wrote:
> On 10/07/2013 01:21 PM, Robert C Jennings wrote:
> > spd.partial[page_nr].offset = loff;
> > spd.partial[page_nr].len = this_len;
> > + spd.partial[page_nr].useraddr = index << PAGE_CACHE_SHIFT;
> > len -= this_len
* Vlastimil Babka (vba...@suse.cz) wrote:
> On 10/07/2013 10:21 PM, Robert C Jennings wrote:
> > Introduce use of the unused SPLICE_F_MOVE flag for vmsplice to zap
> > pages.
> >
> > When vmsplice is called with flags (SPLICE_F_GIFT | SPLICE_F_MOVE) the
> > writer's gift'ed pages would be zapped.
* Dave Hansen (d...@sr71.net) wrote:
> On 10/07/2013 01:21 PM, Robert C Jennings wrote:
> > + } else {
> > + if (vma)
> > + zap_page_range(vma,
> > +
* Dave Hansen (d...@sr71.net) wrote:
> On 10/07/2013 01:21 PM, Robert C Jennings wrote:
> > + if (!buf->offset && (buf->len == PAGE_SIZE) &&
> > + (buf->flags & PIPE_BUF_FLAG_GIFT) && (sd->flags & SPLICE_F_MOVE)) {
> > + struct page *page = buf->page;
> > + struct mm_str
* Dave Hansen (d...@sr71.net) wrote:
> On 07/25/2013 10:21 AM, Robert Jennings wrote:
> > +static void zap_buf_page(unsigned long useraddr)
> > +{
> > + struct vm_area_struct *vma;
> > +
> > + down_read(¤t->mm->mmap_sem);
> > + vma
ing them. That patch has the
restriction that the page must not be mapped by the source for the move,
otherwise it will fall back to copying the page.
Signed-off-by: Matt Helsley
Signed-off-by: Matt Helsley
Signed-off-by: Robert Jennings
---
fs/splice.c| 25 -
d.
Signed-off-by: Matt Helsley
Signed-off-by: Matt Helsley
Signed-off-by: Robert Jennings
---
fs/splice.c | 63 +
1 file changed, 63 insertions(+)
diff --git a/fs/splice.c b/fs/splice.c
index 6aa964f..0a715c3 100644
--- a/fs/splice.
This patch set would add the ability to move anonymous user pages from one
process to another through vmsplice without copying data. Moving pages
rather than copying is implemented for a narrow case in this RFC to meet
the needs of QEMU's usage (below).
Among the restrictions the source address a
* Bob (bob@oracle.com) wrote:
> On 03/14/2013 06:59 AM, Seth Jennings wrote:
> >On 03/13/2013 03:02 PM, Dan Magenheimer wrote:
> >>>From: Robert Jennings [mailto:r...@linux.vnet.ibm.com]
> >>>Subject: Re: zsmalloc limitations and related topics
> >>
&
* Dan Magenheimer (dan.magenhei...@oracle.com) wrote:
> Hi all --
>
> I've been doing some experimentation on zsmalloc in preparation
> for my topic proposed for LSFMM13 and have run across some
> perplexing limitations. Those familiar with the intimate details
> of zsmalloc might be well aware o
* Seth Jennings (sjenn...@linux.vnet.ibm.com) wrote:
> On 01/31/2013 01:07 AM, Minchan Kim wrote:
> > On Tue, Jan 29, 2013 at 03:40:23PM -0600, Seth Jennings wrote:
> >> zswap is a thin compression backend for frontswap. It receives
> >> pages from frontswap and attempts to store them in a compress
Add a MAINTAINERS entry for the IBM Power Virtual SCSI and FC device
drivers.
Signed-off-by: Robert Jennings
---
MAINTAINERS |7 +++
1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/MAINTAINERS b/MAINTAINERS
index fb036a0..f441c46 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
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