On 02/19/2015 02:08 AM, Felipe Franciosi wrote:
-Original Message-
From: Konrad Rzeszutek Wilk [mailto:konrad.w...@oracle.com]
Sent: 18 February 2015 17:38
To: Roger Pau Monne
Cc: Bob Liu; xen-de...@lists.xen.org; David Vrabel; linux-
ker...@vger.kernel.org; Felipe Franciosi; ax
On 02/19/2015 02:22 AM, Felipe Franciosi wrote:
-Original Message-
From: Bob Liu [mailto:bob@oracle.com]
Sent: 15 February 2015 08:19
To: xen-de...@lists.xen.org
Cc: David Vrabel; linux-kernel@vger.kernel.org; Roger Pau Monne;
konrad.w...@oracle.com; Felipe Franciosi; ax
A ring is the representation of a hardware queue, this patch separate ring
information from blkfront_info to an new struct blkfront_ring_info to make
preparation for real multi hardware queues supporting.
Signed-off-by: Arianna Avanzini
Signed-off-by: Bob Liu
---
drivers/block/xen-blkfront.c
This patch convert xen-blkfront driver to use the block multiqueue API and
force to use only one hardware queue at this time.
Signed-off-by: Arianna Avanzini
Signed-off-by: Bob Liu
---
drivers/block/xen-blkfront.c | 118 ---
1 file changed, 100
Drop unnecessary holding of info->io_lock when calling into blk-mq apis.
Signed-off-by: Bob Liu
---
drivers/block/xen-blkfront.c | 38 --
1 file changed, 16 insertions(+), 22 deletions(-)
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/
68k284k+410%
32 65k196k+300%
64 63k183k+290%
More results are coming, there was also big improvement on both write-IOPS and
latency.
Any comments or suggestions are welcome.
Thank you,
-Bob Liu
Bob Liu
This patch separate ring information from struct xen_blkif to an new struct
xen_blkif_ring to make preparation for real multi hardware queues supporting.
Signed-off-by: Arianna Avanzini
Signed-off-by: Bob Liu
---
drivers/block/xen-blkback/blkback.c | 362
multi-queue-num-queues".
Signed-off-by: Bob Liu
---
drivers/block/xen-blkfront.c | 71
1 file changed, 66 insertions(+), 5 deletions(-)
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index d551be0..32caf85 100644
---
Prepare patch for multi hardware queues, the ring number was mandatory set to 1.
Signed-off-by: Arianna Avanzini
Signed-off-by: Bob Liu
---
drivers/block/xen-blkback/common.h | 3 +-
drivers/block/xen-blkback/xenbus.c | 368 +++--
2 files changed, 233
Backend advertise the max number it supported to "multi-queue-max-queues", and
read the negotiate value from "multi-queue-num-queues".
Signed-off-by: Bob Liu
---
drivers/block/xen-blkback/blkback.c | 8
drivers/block/xen-blkback/xenbus.c | 36 +++
0086 880283f75038
Call Trace:
[] ? __hrtimer_start_range_ns+0x269/0x27b
[] ? hrtimer_start+0x13/0x15
[] ? rcu_eqs_enter+0x66/0x79
[] ? default_idle+0x9/0xd
[] ? arch_cpu_idle+0xa/0xc
[] ? cpu_startup_entry+0x118/0x253
[] ? start_secondary+0x12e/0x132
Signed-off-by: Bob Liu
---
drivers/block/xen
Prepare patch for multi hardware queues, the ring number was mandatory set to 1.
Signed-off-by: Arianna Avanzini
Signed-off-by: Bob Liu
---
drivers/block/xen-blkfront.c | 408 +--
1 file changed, 234 insertions(+), 174 deletions(-)
diff --git a/drivers
As Christoph suggested, remove the legacy support similar to most
drivers coverted (virtio, mtip, and nvme).
Signed-off-by: Arianna Avanzini
Signed-off-by: Bob Liu
---
drivers/block/xen-blkfront.c | 167 +--
1 file changed, 32 insertions(+), 135
This patch separate ring information from struct xen_blkif to an new struct
xen_blkif_ring to make preparation for real multi hardware queues supporting.
Signed-off-by: Arianna Avanzini avanzini.aria...@gmail.com
Signed-off-by: Bob Liu bob@oracle.com
---
drivers/block/xen-blkback/blkback.c
.
Signed-off-by: Bob Liu bob@oracle.com
---
drivers/block/xen-blkfront.c | 71
1 file changed, 66 insertions(+), 5 deletions(-)
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index d551be0..32caf85 100644
--- a/drivers
Prepare patch for multi hardware queues, the ring number was mandatory set to 1.
Signed-off-by: Arianna Avanzini avanzini.aria...@gmail.com
Signed-off-by: Bob Liu bob@oracle.com
---
drivers/block/xen-blkback/common.h | 3 +-
drivers/block/xen-blkback/xenbus.c | 368
Backend advertise the max number it supported to multi-queue-max-queues, and
read the negotiate value from multi-queue-num-queues.
Signed-off-by: Bob Liu bob@oracle.com
---
drivers/block/xen-blkback/blkback.c | 8
drivers/block/xen-blkback/xenbus.c | 36
] ? cpu_startup_entry+0x118/0x253
[81030f57] ? start_secondary+0x12e/0x132
Signed-off-by: Bob Liu bob@oracle.com
---
drivers/block/xen-blkfront.c | 47 ++--
1 file changed, 28 insertions(+), 19 deletions(-)
diff --git a/drivers/block/xen-blkfront.c b/drivers
Prepare patch for multi hardware queues, the ring number was mandatory set to 1.
Signed-off-by: Arianna Avanzini avanzini.aria...@gmail.com
Signed-off-by: Bob Liu bob@oracle.com
---
drivers/block/xen-blkfront.c | 408 +--
1 file changed, 234 insertions
As Christoph suggested, remove the legacy support similar to most
drivers coverted (virtio, mtip, and nvme).
Signed-off-by: Arianna Avanzini avanzini.aria...@gmail.com
Signed-off-by: Bob Liu bob@oracle.com
---
drivers/block/xen-blkfront.c | 167 +--
1
Drop unnecessary holding of info-io_lock when calling into blk-mq apis.
Signed-off-by: Bob Liu bob@oracle.com
---
drivers/block/xen-blkfront.c | 38 --
1 file changed, 16 insertions(+), 22 deletions(-)
diff --git a/drivers/block/xen-blkfront.c b/drivers
%
32 65k196k+300%
64 63k183k+290%
More results are coming, there was also big improvement on both write-IOPS and
latency.
Any comments or suggestions are welcome.
Thank you,
-Bob Liu
Bob Liu (10):
xen/blkfront: convert to blk
A ring is the representation of a hardware queue, this patch separate ring
information from blkfront_info to an new struct blkfront_ring_info to make
preparation for real multi hardware queues supporting.
Signed-off-by: Arianna Avanzini avanzini.aria...@gmail.com
Signed-off-by: Bob Liu bob
This patch convert xen-blkfront driver to use the block multiqueue API and
force to use only one hardware queue at this time.
Signed-off-by: Arianna Avanzini avanzini.aria...@gmail.com
Signed-off-by: Bob Liu bob@oracle.com
---
drivers/block/xen-blkfront.c | 118
On 02/06/2015 07:01 PM, Wei Liu wrote:
> On Fri, Feb 06, 2015 at 06:47:17PM +0800, Bob Liu wrote:
>>
>> On 02/02/2015 06:43 PM, Roger Pau Monné wrote:
>>> El 23/01/15 a les 10.14, Bob Liu ha escrit:
>>>> Extend xen/block to support multi-page ring.
>>>
On 02/02/2015 06:43 PM, Roger Pau Monné wrote:
> El 23/01/15 a les 10.14, Bob Liu ha escrit:
>> Extend xen/block to support multi-page ring.
>> * xen-blkback notify blkfront with feature-multi-ring-pages
>> * xen-blkfront write to xenstore about how many pages
.xen.org
> [mailto:xen-devel-boun...@lists.xen.org] On Behalf Of Bob Liu
> Sent: 23 January 2015 10:15
> To: xen-de...@lists.xen.org
> Cc: Wei Liu; linux-kernel@vger.kernel.org; Bob Liu; David Vrabel;
> boris.ostrov...@oracle.com; Roger Pau Monne
> Subject: [Xen-devel] [PATCH 2/2] dri
be 128
inflight requests instead of 32.
Thanks,
-Bob
What was the host configuration for the test?
What was the VM configuration for the test?
Thanks,
Felipe
-Original Message-
From: xen-devel-boun...@lists.xen.org
[mailto:xen-devel-boun...@lists.xen.org] On Behalf Of Bob Liu
On 02/02/2015 06:43 PM, Roger Pau Monné wrote:
El 23/01/15 a les 10.14, Bob Liu ha escrit:
Extend xen/block to support multi-page ring.
* xen-blkback notify blkfront with feature-multi-ring-pages
* xen-blkfront write to xenstore about how many pages are used as the ring
If using 4 pages
On 02/06/2015 07:01 PM, Wei Liu wrote:
On Fri, Feb 06, 2015 at 06:47:17PM +0800, Bob Liu wrote:
On 02/02/2015 06:43 PM, Roger Pau Monné wrote:
El 23/01/15 a les 10.14, Bob Liu ha escrit:
Extend xen/block to support multi-page ring.
* xen-blkback notify blkfront with feature-multi-ring
system.
Signed-off-by: Bob Liu
---
drivers/block/xen-blkback/xenbus.c | 86 +
drivers/block/xen-blkfront.c | 94 ++--
2 files changed, 133 insertions(+), 47 deletions(-)
diff --git a/drivers/block/xen-blkback/xenbus.c
b
off-by: Bob Liu
---
drivers/block/xen-blkback/xenbus.c |5 +-
drivers/block/xen-blkfront.c |5 +-
drivers/char/tpm/xen-tpmfront.c|5 +-
drivers/net/xen-netback/netback.c |4 +-
drivers/net/xen-netfront.c |9 +-
drivers/pci/xen-pcifront.c |
-by: Wei Liu wei.l...@citrix.com
Signed-off-by: Bob Liu bob@oracle.com
---
drivers/block/xen-blkback/xenbus.c |5 +-
drivers/block/xen-blkfront.c |5 +-
drivers/char/tpm/xen-tpmfront.c|5 +-
drivers/net/xen-netback/netback.c |4 +-
drivers/net/xen-netfront.c |9
system.
Signed-off-by: Bob Liu bob@oracle.com
---
drivers/block/xen-blkback/xenbus.c | 86 +
drivers/block/xen-blkfront.c | 94 ++--
2 files changed, 133 insertions(+), 47 deletions(-)
diff --git a/drivers/block/xen-blkback
tem.
The default max size(128k) is not appropriate anymore, this patch increases it
to 128(128*4k=512k).
Signed-off-by: Bob Liu
---
drivers/block/xen-blkfront.c |4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
in
.
The default max size(128k) is not appropriate anymore, this patch increases it
to 128(128*4k=512k).
Signed-off-by: Bob Liu bob@oracle.com
---
drivers/block/xen-blkfront.c |4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen
On 01/12/2015 07:36 PM, Roger Pau Monné wrote:
> El 12/01/15 a les 8.09, Bob Liu ha escrit:
>>
>> On 01/09/2015 11:51 PM, Roger Pau Monné wrote:
>>> El 06/01/15 a les 14.19, Bob Liu ha escrit:
>>>> When there is no enough free grants, gnttab_alloc_grant_r
On 01/12/2015 07:36 PM, Roger Pau Monné wrote:
> El 12/01/15 a les 8.09, Bob Liu ha escrit:
>>
>> On 01/09/2015 11:51 PM, Roger Pau Monné wrote:
>>> El 06/01/15 a les 14.19, Bob Liu ha escrit:
>>>> When there is no enough free grants, gnttab_alloc_grant_r
On 01/12/2015 07:36 PM, Roger Pau Monné wrote:
El 12/01/15 a les 8.09, Bob Liu ha escrit:
On 01/09/2015 11:51 PM, Roger Pau Monné wrote:
El 06/01/15 a les 14.19, Bob Liu ha escrit:
When there is no enough free grants, gnttab_alloc_grant_references()
will fail and block request queue
On 01/12/2015 07:36 PM, Roger Pau Monné wrote:
El 12/01/15 a les 8.09, Bob Liu ha escrit:
On 01/09/2015 11:51 PM, Roger Pau Monné wrote:
El 06/01/15 a les 14.19, Bob Liu ha escrit:
When there is no enough free grants, gnttab_alloc_grant_references()
will fail and block request queue
On 01/09/2015 11:51 PM, Roger Pau Monné wrote:
> El 06/01/15 a les 14.19, Bob Liu ha escrit:
>> When there is no enough free grants, gnttab_alloc_grant_references()
>> will fail and block request queue will stop.
>> If the system is always lack of grants, blkif_restart_q
On 01/09/2015 11:51 PM, Roger Pau Monné wrote:
> El 06/01/15 a les 14.19, Bob Liu ha escrit:
>> When there is no enough free grants, gnttab_alloc_grant_references()
>> will fail and block request queue will stop.
>> If the system is always lack of grants, blkif_restart_q
On 01/09/2015 11:51 PM, Roger Pau Monné wrote:
El 06/01/15 a les 14.19, Bob Liu ha escrit:
When there is no enough free grants, gnttab_alloc_grant_references()
will fail and block request queue will stop.
If the system is always lack of grants, blkif_restart_queue_callback() can't
On 01/09/2015 11:51 PM, Roger Pau Monné wrote:
El 06/01/15 a les 14.19, Bob Liu ha escrit:
When there is no enough free grants, gnttab_alloc_grant_references()
will fail and block request queue will stop.
If the system is always lack of grants, blkif_restart_queue_callback() can't
complete, some grants may free to
persistent_gnts_c, we can give the request queue another chance to restart and
avoid block hang.
Reported-by: Junxiao Bi
Signed-off-by: Bob Liu
---
drivers/block/xen-blkfront.c | 11 +++
1 file changed, 11 insertions(+)
diff --git a/drivers/block/xen
complete, some grants may free to
persistent_gnts_c, we can give the request queue another chance to restart and
avoid block hang.
Reported-by: Junxiao Bi junxiao...@oracle.com
Signed-off-by: Bob Liu bob@oracle.com
---
drivers/block/xen-blkfront.c | 11 +++
1 file changed, 11
On 12/16/2014 06:32 PM, Roger Pau Monné wrote:
> El 16/12/14 a les 11.11, Bob Liu ha escrit:
>> The default maximum value of segments in indirect requests was 32, IO
>> operations with bigger block size(>32*4k) would be split and performance
>> start
>> to drop.
On 12/16/2014 06:32 PM, Roger Pau Monné wrote:
El 16/12/14 a les 11.11, Bob Liu ha escrit:
The default maximum value of segments in indirect requests was 32, IO
operations with bigger block size(32*4k) would be split and performance
start
to drop.
Nowadays backend device usually support
tem.
The default size 128k was not very appropriate, this patch increases the default
maximum value to 128(128*4k=512k).
Signed-off-by: Bob Liu
---
drivers/block/xen-blkfront.c |4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/
.
The default size 128k was not very appropriate, this patch increases the default
maximum value to 128(128*4k=512k).
Signed-off-by: Bob Liu bob@oracle.com
---
drivers/block/xen-blkfront.c |4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/block/xen-blkfront.c b
o be used.
>>
>> Does it make sense for number of queues should be dependent on the
>> number of queues available in the underlying block device?
>
> Thank you for raising that point. It probably is not the best solution.
>
> Bob Liu suggested to have the number of I/O
of queues available in the underlying block device?
Thank you for raising that point. It probably is not the best solution.
Bob Liu suggested to have the number of I/O rings depend on the number
of vCPUs in the driver domain. Konrad Wilk suggested to compute the
number of I/O rings
On 07/16/2014 08:13 AM, David Rientjes wrote:
> Commit 9f1b868a13ac ("mm: thp: khugepaged: add policy for finding target
> node") improved the previous khugepaged logic which allocated a
> transparent hugepages from the node of the first page being collapsed.
>
> However, it is still possible
On 07/16/2014 08:13 AM, David Rientjes wrote:
Commit 9f1b868a13ac (mm: thp: khugepaged: add policy for finding target
node) improved the previous khugepaged logic which allocated a
transparent hugepages from the node of the first page being collapsed.
However, it is still possible to
e to use the higher density of zsmalloc.
>
Nice job!
I also made a attempt last year, but didn't finish.
> Note this patch set does not change zram to use zpool, although that
> change should be possible as well.
>
This version looks good to me!
Reviewed-by: Bob Liu
>
a attempt last year, but didn't finish.
Note this patch set does not change zram to use zpool, although that
change should be possible as well.
This version looks good to me!
Reviewed-by: Bob Liu bob@oracle.com
---
Changes since v3 : https://lkml.org/lkml/2014/5/24/130
On 05/03/2014 04:00 AM, Dan Streetman wrote:
> On Fri, Apr 25, 2014 at 12:15 AM, Weijie Yang
> wrote:
>> On Fri, Apr 25, 2014 at 2:48 AM, Dan Streetman wrote:
>>> On Wed, Apr 23, 2014 at 6:34 AM, Mel Gorman wrote:
On Sat, Apr 12, 2014 at 05:00:53PM -0400, Dan Streetman wrote:
>
>
On 05/03/2014 04:00 AM, Dan Streetman wrote:
On Fri, Apr 25, 2014 at 12:15 AM, Weijie Yang weijie.yang...@gmail.com
wrote:
On Fri, Apr 25, 2014 at 2:48 AM, Dan Streetman ddstr...@ieee.org wrote:
On Wed, Apr 23, 2014 at 6:34 AM, Mel Gorman mgor...@suse.de wrote:
On Sat, Apr 12, 2014 at
On Wed, Apr 16, 2014 at 4:42 PM, Kirill A. Shutemov
wrote:
> On Wed, Apr 16, 2014 at 07:52:29AM +0800, Bob Liu wrote:
>> > *ptl = pmd_lock(mm, pmd);
>> > - if (pmd_none(*pmd))
>> > + if (!pmd_present(*pmd))
>> > goto unlo
On Wed, Apr 16, 2014 at 4:42 PM, Kirill A. Shutemov
kir...@shutemov.name wrote:
On Wed, Apr 16, 2014 at 07:52:29AM +0800, Bob Liu wrote:
*ptl = pmd_lock(mm, pmd);
- if (pmd_none(*pmd))
+ if (!pmd_present(*pmd))
goto unlock;
But I didn't get the idea
On Wed, Apr 16, 2014 at 5:48 AM, Kirill A. Shutemov
wrote:
> Sasha Levin has reported two THP BUGs[1][2]. I believe both of them have
> the same root cause. Let's look to them one by one.
>
> The first bug[1] is "kernel BUG at mm/huge_memory.c:1829!".
> It's BUG_ON(mapcount !=
On Wed, Apr 16, 2014 at 5:48 AM, Kirill A. Shutemov
kirill.shute...@linux.intel.com wrote:
Sasha Levin has reported two THP BUGs[1][2]. I believe both of them have
the same root cause. Let's look to them one by one.
The first bug[1] is kernel BUG at mm/huge_memory.c:1829!.
It's
On Tue, Apr 8, 2014 at 10:37 PM, Sasha Levin wrote:
> Hi all,
>
> While fuzzing with trinity inside a KVM tools guest running the latest -next
> kernel, I've stumbled on the following:
>
Wow! There are so many huge memory related bugs recently.
AFAIR, there were still several without fix. I
On Tue, Apr 8, 2014 at 10:37 PM, Sasha Levin sasha.le...@oracle.com wrote:
Hi all,
While fuzzing with trinity inside a KVM tools guest running the latest -next
kernel, I've stumbled on the following:
Wow! There are so many huge memory related bugs recently.
AFAIR, there were still several
On Mon, Mar 31, 2014 at 11:35 PM, Dan Streetman wrote:
> On Mon, Mar 31, 2014 at 8:43 AM, Bob Liu wrote:
>> On Fri, Mar 28, 2014 at 10:47 PM, Dan Streetman wrote:
>>> On Fri, Mar 28, 2014 at 10:32 AM, Rik van Riel wrote:
>>>> On 03/28/2014 08:36 AM, Dan Stree
On Mon, Mar 31, 2014 at 11:35 PM, Dan Streetman ddstr...@ieee.org wrote:
On Mon, Mar 31, 2014 at 8:43 AM, Bob Liu lliu...@gmail.com wrote:
On Fri, Mar 28, 2014 at 10:47 PM, Dan Streetman ddstr...@ieee.org wrote:
On Fri, Mar 28, 2014 at 10:32 AM, Rik van Riel r...@redhat.com wrote:
On 03/28
On Fri, Mar 28, 2014 at 10:47 PM, Dan Streetman wrote:
> On Fri, Mar 28, 2014 at 10:32 AM, Rik van Riel wrote:
>> On 03/28/2014 08:36 AM, Dan Streetman wrote:
>>
>>> Well my general idea was to modify shrink_page_list() so that instead
>>> of calling add_to_swap() and then pageout(), anonymous
On Fri, Mar 28, 2014 at 10:47 PM, Dan Streetman ddstr...@ieee.org wrote:
On Fri, Mar 28, 2014 at 10:32 AM, Rik van Riel r...@redhat.com wrote:
On 03/28/2014 08:36 AM, Dan Streetman wrote:
Well my general idea was to modify shrink_page_list() so that instead
of calling add_to_swap() and then
On 02/18/2014 04:01 PM, Yuanhan Liu wrote:
> Hi,
>
> Commit e82e0561("mm: vmscan: obey proportional scanning requirements for
> kswapd") caused a big performance regression(73%) for vm-scalability/
> lru-file-readonce testcase on a system with 256G memory without swap.
>
> That testcase simply
On 03/12/2014 09:25 AM, Bob Liu wrote:
>
> On 03/12/2014 04:07 AM, Sasha Levin wrote:
>> Hi all,
>>
>> While fuzzing with trinity inside a KVM tools guest running latest -next
>> kernel
>> I've stumbled on the following spew:
>>
>> [ 477.30195
On 03/12/2014 09:25 AM, Bob Liu wrote:
On 03/12/2014 04:07 AM, Sasha Levin wrote:
Hi all,
While fuzzing with trinity inside a KVM tools guest running latest -next
kernel
I've stumbled on the following spew:
[ 477.301955] kernel BUG at mm/swap.c:609!
[ 477.302564] invalid opcode:
On 02/18/2014 04:01 PM, Yuanhan Liu wrote:
Hi,
Commit e82e0561(mm: vmscan: obey proportional scanning requirements for
kswapd) caused a big performance regression(73%) for vm-scalability/
lru-file-readonce testcase on a system with 256G memory without swap.
That testcase simply looks
On 03/12/2014 04:07 AM, Sasha Levin wrote:
> Hi all,
>
> While fuzzing with trinity inside a KVM tools guest running latest -next
> kernel
> I've stumbled on the following spew:
>
> [ 477.301955] kernel BUG at mm/swap.c:609!
> [ 477.302564] invalid opcode: [#1] PREEMPT SMP
On 03/12/2014 04:07 AM, Sasha Levin wrote:
Hi all,
While fuzzing with trinity inside a KVM tools guest running latest -next
kernel
I've stumbled on the following spew:
[ 477.301955] kernel BUG at mm/swap.c:609!
[ 477.302564] invalid opcode: [#1] PREEMPT SMP DEBUG_PAGEALLOC
[
On Thu, Feb 27, 2014 at 11:03 PM, Kirill A. Shutemov
wrote:
> Sasha Levin wrote:
>> Hi all,
>>
>> While fuzzing with trinity inside a KVM tools guest running latest -next
>> kernel I've stumbled on the
>> following spew:
>>
>> [ 1428.146261] kernel BUG at mm/huge_memory.c:2785!
>
> Hm,
On Thu, Feb 27, 2014 at 11:03 PM, Kirill A. Shutemov
kirill.shute...@linux.intel.com wrote:
Sasha Levin wrote:
Hi all,
While fuzzing with trinity inside a KVM tools guest running latest -next
kernel I've stumbled on the
following spew:
[ 1428.146261] kernel BUG at mm/huge_memory.c:2785!
On Wed, Feb 26, 2014 at 10:09 PM, Kirill A. Shutemov
wrote:
> On Wed, Feb 26, 2014 at 03:15:07PM +0800, Bob Liu wrote:
>> On Wed, Feb 26, 2014 at 3:32 AM, Sasha Levin wrote:
>> > Hi all,
>> >
>> > While fuzzing with trinity inside a KVM tools running la
On Wed, Feb 26, 2014 at 10:09 PM, Kirill A. Shutemov
kir...@shutemov.name wrote:
On Wed, Feb 26, 2014 at 03:15:07PM +0800, Bob Liu wrote:
On Wed, Feb 26, 2014 at 3:32 AM, Sasha Levin sasha.le...@oracle.com wrote:
Hi all,
While fuzzing with trinity inside a KVM tools running latest -next
On Wed, Feb 26, 2014 at 3:32 AM, Sasha Levin wrote:
> Hi all,
>
> While fuzzing with trinity inside a KVM tools running latest -next kernel
> I've stumbled on the following spew:
>
> [ 232.869443] BUG: unable to handle kernel NULL pointer dereference at
> 0020
> [ 232.870230] IP: []
On Tue, Feb 25, 2014 at 7:01 AM, Vinson Lee wrote:
> Hi.
>
> This kernel BUG was triggered while running trinity fuzzer on 3.10.
>
Seems like the same bug as Sasha reported.
Please take a look at:
https://lkml.org/lkml/2014/1/7/637
Or
http://www.spinics.net/lists/linux-mm/msg66972.html
>
ge variable name - Seth
> * remove unnecessary BUG_ON and white space - Seth
>
> Reported-by: Cai Liu
> Suggested-by: Weijie Yang
> Signed-off-by: Minchan Kim
Looks good to me, thanks.
Reviewed-by: Bob Liu
> ---
> mm/zswap.c | 64
> ++
Suggested-by: Weijie Yang weijie.yang...@gmail.com
Signed-off-by: Minchan Kim minc...@kernel.org
Looks good to me, thanks.
Reviewed-by: Bob Liu bob@oracle.com
---
mm/zswap.c | 64
--
1 file changed, 33 insertions(+), 31
On Tue, Feb 25, 2014 at 7:01 AM, Vinson Lee v...@twopensource.com wrote:
Hi.
This kernel BUG was triggered while running trinity fuzzer on 3.10.
Seems like the same bug as Sasha reported.
Please take a look at:
https://lkml.org/lkml/2014/1/7/637
Or
On Wed, Feb 26, 2014 at 3:32 AM, Sasha Levin sasha.le...@oracle.com wrote:
Hi all,
While fuzzing with trinity inside a KVM tools running latest -next kernel
I've stumbled on the following spew:
[ 232.869443] BUG: unable to handle kernel NULL pointer dereference at
0020
[
() and continue to get back pages from frontswap!!
Signed-off-by: Bob Liu
---
drivers/xen/xen-selfballoon.c |1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/xen/xen-selfballoon.c b/drivers/xen/xen-selfballoon.c
index 21e18c1..bd0b416 100644
--- a/drivers/xen/xen-selfballoon.c
+++ b/drivers/xen
() and continue to get back pages from frontswap!!
Signed-off-by: Bob Liu bob@oracle.com
---
drivers/xen/xen-selfballoon.c |1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/xen/xen-selfballoon.c b/drivers/xen/xen-selfballoon.c
index 21e18c1..bd0b416 100644
--- a/drivers/xen/xen-selfballoon.c
On 01/23/2014 08:18 AM, Minchan Kim wrote:
> Hello all,
>
> On Wed, Jan 22, 2014 at 12:33:58PM -0800, Andrew Morton wrote:
>> On Wed, 22 Jan 2014 09:19:58 -0500 Dan Streetman wrote:
>>
>>> Acutally, I really don't know how much benefit we have that in-memory
>>> swap overcomming to the
On 01/23/2014 08:18 AM, Minchan Kim wrote:
Hello all,
On Wed, Jan 22, 2014 at 12:33:58PM -0800, Andrew Morton wrote:
On Wed, 22 Jan 2014 09:19:58 -0500 Dan Streetman ddstr...@ieee.org wrote:
Acutally, I really don't know how much benefit we have that in-memory
swap overcomming to the real
not that aggressive by adding extra 10%
of total ram pages to goal_page.
It's more valuable to keep the guest system reliable and response faster than
balloon out these 10% pages to XEN.
Signed-off-by: Bob Liu
---
drivers/xen/xen-selfballoon.c | 22 ++
1 file changed, 22 insertions(+)
diff
not that aggressive by adding extra 10%
of total ram pages to goal_page.
It's more valuable to keep the guest system reliable and response faster than
balloon out these 10% pages to XEN.
Signed-off-by: Bob Liu bob@oracle.com
---
drivers/xen/xen-selfballoon.c | 22 ++
1 file changed, 22
On Tue, Jan 21, 2014 at 11:07 AM, Cai Liu wrote:
> Thanks for your review.
>
> 2014/1/21 Minchan Kim :
>> Hello Cai,
>>
>> On Mon, Jan 20, 2014 at 03:50:18PM +0800, Cai Liu wrote:
>>> zswap can support multiple swapfiles. So we need to check
>>> all zbud pool pages in zswap.
>>>
>>> Version 2:
On Tue, Jan 21, 2014 at 11:07 AM, Cai Liu liucai@gmail.com wrote:
Thanks for your review.
2014/1/21 Minchan Kim minc...@kernel.org:
Hello Cai,
On Mon, Jan 20, 2014 at 03:50:18PM +0800, Cai Liu wrote:
zswap can support multiple swapfiles. So we need to check
all zbud pool pages in
Hi Johannes,
On 01/11/2014 02:10 AM, Johannes Weiner wrote:
> Previously, page cache radix tree nodes were freed after reclaim
> emptied out their page pointers. But now reclaim stores shadow
> entries in their place, which are only reclaimed when the inodes
> themselves are reclaimed. This is
On 01/15/2014 03:16 AM, Johannes Weiner wrote:
> On Tue, Jan 14, 2014 at 09:01:09AM +0800, Bob Liu wrote:
>> Hi Johannes,
>>
>> On 01/11/2014 02:10 AM, Johannes Weiner wrote:
>>> The VM maintains cached filesystem pages on two types of lists. One
>>>
On 01/15/2014 03:16 AM, Johannes Weiner wrote:
On Tue, Jan 14, 2014 at 09:01:09AM +0800, Bob Liu wrote:
Hi Johannes,
On 01/11/2014 02:10 AM, Johannes Weiner wrote:
The VM maintains cached filesystem pages on two types of lists. One
list holds the pages recently faulted into the cache
Hi Johannes,
On 01/11/2014 02:10 AM, Johannes Weiner wrote:
Previously, page cache radix tree nodes were freed after reclaim
emptied out their page pointers. But now reclaim stores shadow
entries in their place, which are only reclaimed when the inodes
themselves are reclaimed. This is
On 01/14/2014 01:05 PM, Minchan Kim wrote:
> On Tue, Jan 14, 2014 at 01:50:22PM +0900, Minchan Kim wrote:
>> Hello Bob,
>>
>> On Tue, Jan 14, 2014 at 09:19:23AM +0800, Bob Liu wrote:
>>>
>>> On 01/14/2014 07:35 AM, Minchan Kim wrote:
>>>> Hello,
ol_pages too frequently?
> As I read the code, I think it's okay to update it only when user
> want to see it by debugfs and zswap_is_full is called.
> So could we optimize it out?
>
>>
>> Signed-off-by: Cai Liu
Reviewed-by: Bob Liu
>> ---
>> mm/zswap.c | 1
Hi Johannes,
On 01/11/2014 02:10 AM, Johannes Weiner wrote:
> The VM maintains cached filesystem pages on two types of lists. One
> list holds the pages recently faulted into the cache, the other list
> holds pages that have been referenced repeatedly on that first list.
> The idea is to prefer
Hi Johannes,
On 01/11/2014 02:10 AM, Johannes Weiner wrote:
The VM maintains cached filesystem pages on two types of lists. One
list holds the pages recently faulted into the cache, the other list
holds pages that have been referenced repeatedly on that first list.
The idea is to prefer
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