1.661
1024 FRC196.425 6.166
2048 FRC FRC 23.291
4096 FRC FRC 47.117
*FRC = failed to reach confidence level
--
Mike Kravetz [EMAIL PROTECTED]
IBM Linux
On Fri, Jan 19, 2001 at 01:26:16AM +0100, Andrea Arcangeli wrote:
On Thu, Jan 18, 2001 at 03:53:11PM -0800, Mike Kravetz wrote:
Here are some very preliminary numbers from sched_test_yield
(which was previously posted to this (lse-tech) list by Bill
Hartner). Tests were run on a system
queue lock at 57%. Now, I know nothing about this
benchmark, but it will be interesting to see what happens after
applying my patch.
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IBM Linux Technology Center
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On Fri, Jan 19, 2001 at 02:30:41AM +0100, Andrea Arcangeli wrote:
On Thu, Jan 18, 2001 at 04:52:25PM -0800, Mike Kravetz wrote:
was less than the number of processors. I'll give the tests a try
with a smaller number of threads. I'm also open to suggestions for
OK!
what benchmarks
of
running tasks is less than the number of processors.
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IBM Linux Technology Center
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Please read the F
multi-queue scheduler, tasks on a remote queue
must have high enough priority (to overcome this boost) before being
moved to the local queue.
--
Mike Kravetz [EMAIL PROTECTED]
IBM Linux Technology Center
15450 SW Koll Parkway
Beaverton, OR 97006-6063
On Thu, Jan 18, 2001 at 05:34:35PM -0800, Mike Kravetz wrote:
On Fri, Jan 19, 2001 at 02:30:41AM +0100, Andrea Arcangeli wrote:
On Thu, Jan 18, 2001 at 04:52:25PM -0800, Mike Kravetz wrote:
was less than the number of processors. I'll give the tests a try
with a smaller number
On Fri, Jan 19, 2001 at 12:49:21PM -0800, Mike Kravetz showed his lack
of internet slang understanding and wrote:
It was my intention to post IIRC numbers for small thread counts today.
However, the benchmark (not the system) seems to hang on occasion. This
occurs on both the unmodified
. That is why you need to put some type of synchronization in
place.
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IBM Linux Technology Center
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Please re
in
the not too distant future. Until then, we'll be looking into
optimizations to help out the multi-queue scheduler at low
thread counts.
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IBM Linux Technology Center
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statement?
If the above is accurate, then I am wondering what would be a
good scheduler benchmark for these low task count situations.
I could undo the optimizations in sys_sched_yield() (for testing
purposes only!), and run the existing benchmarks. Can anyone
suggest a better solution?
Thanks,
--
Mi
contention. This was done at the expense of the normal case.
I'm currently working on this situation and expect to have a new
patch out in the not too distant future.
I expect the numbers will get better.
--
Mike Kravetz [EMAIL PROTECTED]
IBM Linux Technology Center
, but we also need to be aware of performance in
the non-realtime case.
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IBM Linux Technology Center
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More majordomo info
? OR Is the reasoning that in
these cases there is so much 'scheduling' activity that we
should force the reschedule?
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IBM Linux Technology Center
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are some big IFs.
I know little about the networking stack or this workload.
Just wanted to explain how this scheduling work 'could'
be related to interrupt load.
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Mike Kravetz [EMAIL PROTECTED]
IBM Linux Technology Center
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Ragnar,
Are you sure that was line 115? Could it have been line 515?
Also, do you have any Oops data?
Thanks,
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Mike Kravetz [EMAIL PROTECTED]
IBM Linux Technology Center
15450 SW Koll Parkway
Beaverton, OR 97006-6063 (503)578-3494
On Wed
.
The Scheduling Scalability page is at:
http://lse.sourceforge.net/scheduling/
If you are interested in this work, please join the lse-tech
mailing list at:
http://sourceforge.net/projects/lse
--
Mike Kravetz [EMAIL PROTECTED]
IBM Linux Technology Center
,
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IBM Linux Technology Center
15450 SW Koll Parkway
Beaverton, OR 97006-6063 (503)578-3494
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://sourceforge.net/projects/lse
Thanks,
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IBM Linux Technology Center
15450 SW Koll Parkway
Beaverton, OR 97006-6063 (503)578-3494
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On Wed, May 09, 2001 at 11:29:22AM -0500, Andrew M. Theurer wrote:
I am evaluating Linux 2.4 SMP scalability, using Netbench(r) as a
workload with Samba, and I wanted to get some feedback on results so
far.
Do you have any kernel profile or lock contention data?
--
Mike Kravetz
value as opposed to 1.
My guess is that the threshold value was changed from 0 to
1 in the 2.4 kernel for better performance with some workload.
Anyone remember what that workload was/is?
--
Mike Kravetz [EMAIL PROTECTED]
IBM Linux Technology Center
to the number of CPUs yet
scheduler performance has gone downhill.
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Mike Kravetz [EMAIL PROTECTED]
IBM Linux Technology Center
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More majordomo info
on the runqueue, isn't it possible that another task has a
higher goodness value than the task being awakened. In such a case,
isn't is possible that the awakened task could sit on the runqueue
(waiting for a CPU) while tasks with a lower goodness value are
allowed to run?
--
Mike Kravetz
utilizing 8 CPUs on 2.4.* kernels. This
may seem obvious, but do you have more than 4 CPUs worth of work for the
system to do? What is the runqueue length during this benchmark?
--
Mike Kravetz [EMAIL PROTECTED]
IBM Linux Technology Center
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at:
http://lse.sourceforge.net/scheduling/
I would be interested in your observations.
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' benchmark which attempts to address these issues
(called reflex at the above site). However, I would really like
to get a pointer to a community acceptable workload/benchmark for
these low thread cases.
--
Mike Kravetz [EMAIL PROTECTED]
IBM Linux Technology Center
that
we have moved away from a 'realistic' low task count system load.
lmbench's lat_ctx for example, and other tools in lmbench trigger various
scheduler workloads as well.
Thanks, I'll add these to our list.
--
Mike Kravetz [EMAIL PROTECTED]
IBM Linux Technology
scheduler always attempts to make the same global scheduling decisions
as the current scheduler.
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IBM Linux Technology Center
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considerable effort
to get working in a reasonable well performing manner.
Could you make a port of your thing on recent kernels?
There is a 2.4.2 patch on the web page. I'll put out a 2.4.3 patch
as soon as I get some time.
--
Mike Kravetz [EMAIL PROTECTED]
IBM
I've been trying to track down some unexpected realtime latencies and
believe one source is a bug in the wakeup code. Specifically, this is
within the try_to_wake_up() routine. Within this routine there is the
following code segment:
/*
* If a newly woken up RT task cannot
On Tue, Oct 02, 2007 at 07:06:32AM +0200, Ingo Molnar wrote:
* Mike Kravetz [EMAIL PROTECTED] wrote:
My observations/debugging/conclusions are based on an earlier version
of the code. It appears the same code/issue still exists in the most
version. But, I have not not done any work
On Tue, Oct 02, 2007 at 07:06:32AM +0200, Ingo Molnar wrote:
Index: linux-rt-rebase.q/kernel/sched.c
===
--- linux-rt-rebase.q.orig/kernel/sched.c
+++ linux-rt-rebase.q/kernel/sched.c
@@ -1819,6 +1819,13 @@ out_set_cpu:
Hi Ingo,
After applying the fix to try_to_wake_up() I was still seeing some large
latencies for realtime tasks. Some debug code pointed out two additional
causes of these latencies. I have put fixes into my 'old' kernel and the
scheduler related latencies have gone away. I'm pretty confident
On Fri, Oct 05, 2007 at 07:15:48PM -0700, Mike Kravetz wrote:
After applying the fix to try_to_wake_up() I was still seeing some large
latencies for realtime tasks.
I've been looking for places in the code where reschedule IPIs should
be sent in the case of 'overload' to redistribute RealTime
On Mon, Oct 08, 2007 at 11:04:12PM -0400, Steven Rostedt wrote:
On Mon, Oct 08, 2007 at 11:45:23AM -0700, Mike Kravetz wrote:
Are these accurate statements? I'll start working on a reliable delivery
mechanism for RealTime scheduling. But, I just want to make sure that
is really necessary
On Mon, Oct 08, 2007 at 10:46:21PM -0400, Steven Rostedt wrote:
Mike,
Can you attach your Signed-off-by to this patch, please.
On Fri, Oct 05, 2007 at 07:15:48PM -0700, Mike Kravetz wrote:
Hi Ingo,
After applying the fix to try_to_wake_up() I was still seeing some large
latencies
On Tue, Oct 09, 2007 at 01:59:37PM -0400, Steven Rostedt wrote:
This has been complied tested (and no more ;-)
The idea here is when we find a situation that we just scheduled in an
RT task and we either pushed a lesser RT task away or more than one RT
task was scheduled on this CPU before
On Tue, Oct 09, 2007 at 04:50:47PM -0400, Steven Rostedt wrote:
I did something like this a while ago for another scheduling project.
A couple 'possible' optimizations to think about are:
1) Only scan the remote runqueues once and keep a local copy of the
remote priorities for
On Wed, Oct 10, 2007 at 10:49:35AM -0400, Gregory Haskins wrote:
diff --git a/kernel/sched.c b/kernel/sched.c
index 3e75c62..b7f7a96 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -1869,7 +1869,8 @@ out_activate:
* extra locking in this particular case, because
On Wed, Oct 10, 2007 at 07:50:52AM -0400, Steven Rostedt wrote:
On Tue, Oct 09, 2007 at 11:49:53AM -0700, Mike Kravetz wrote:
The more I try understand the IPI handling the more confused I get. :(
At fist I was concerned about an IPI happening in the middle of the
__schedule routine
and FLAT for others.
--
Signed-off-by: Mike Kravetz [EMAIL PROTECTED]
diff -Naupr linux-2.6.12-rc2-mm1/arch/ppc64/Kconfig
linux-2.6.12-rc2-mm1.work/arch/ppc64/Kconfig
--- linux-2.6.12-rc2-mm1/arch/ppc64/Kconfig 2005-04-05 18:44:57.0
+
+++ linux-2.6.12-rc2-mm1.work/arch/ppc64/Kconfig
On Thu, Feb 17, 2005 at 04:03:53PM -0800, Dave Hansen wrote:
The attached patch
Just tried to compile this and noticed that there is no definition
of valid_section_nr(), referenced in sparse_init.
--
Mike
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and OpenPower 720.
--
Signed-off-by: Mike Kravetz [EMAIL PROTECTED]
diff -Naupr linux-2.6.11.4/arch/ppc64/mm/numa.c
linux-2.6.11.4.work/arch/ppc64/mm/numa.c
--- linux-2.6.11.4/arch/ppc64/mm/numa.c 2005-03-16 00:09:31.0 +
+++ linux-2.6.11.4.work/arch/ppc64/mm/numa.c2005-03-16 17:40
On Wed, Mar 23, 2005 at 11:11:10PM +1100, Michael Ellerman wrote:
Can you test this on your 720 or whatever it was? And if anyone else
has an interesting NUMA machine they can test it on I'd love to hear
about it!
I've tested this with various config options on my 720. Appears to
work
On Thu, Mar 10, 2005 at 02:36:13AM -0800, Andrew Morton wrote:
This patch causes the non-numa G5 to oops very early in boot in
smp_call_function().
OK - Let me take a look.
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Mike
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On Fri, Mar 11, 2005 at 07:51:38PM +1100, Paul Mackerras wrote:
Anyway, the ultimate reason seems to be that the numa.c code is
assuming that an address value and a size value occupy the same number
of cells. On the G5 we have #address-cells = 2 but #size-cells = 1.
Previously this didn't
this on a machine known to break with
the previous version (such as G5).
--
Signed-off-by: Mike Kravetz [EMAIL PROTECTED]
diff -Naupr linux-2.6.11/arch/ppc64/mm/numa.c
linux-2.6.11.work/arch/ppc64/mm/numa.c
--- linux-2.6.11/arch/ppc64/mm/numa.c 2005-03-02 07:38:38.0 +
+++ linux-2.6.11
On Mon, Apr 04, 2005 at 10:50:09AM -0700, Dave Hansen wrote:
diff -puN mm/Kconfig~A6-mm-Kconfig mm/Kconfig
--- memhotplug/mm/Kconfig~A6-mm-Kconfig 2005-04-04 09:04:48.0 -0700
+++ memhotplug-dave/mm/Kconfig 2005-04-04 10:15:23.0 -0700
@@ -0,0 +1,25 @@
+choice
+ prompt Memory
On Thu, Aug 04, 2005 at 03:19:52PM -0700, Christoph Lameter wrote:
This code already exist in the memory hotplug code base and Ray already
had a working implementation for page migration. The migration code will
also be necessary in order to relocate pages with ECC single bit failures
that
On Wed, Dec 13, 2006 at 07:20:57PM +0100, Arnd Bergmann wrote:
After a lot of debugging in spufs, I found that a crash that we encountered
on Cell actually was caused by a change in the memory management.
The patch that caused it is archived in http://lkml.org/lkml/2006/11/1/43,
and this one
time an attempt is made to reserve min_size
pages. If the reservation fails, the mount fails. At umount time,
the reserved pages are released.
Signed-off-by: Mike Kravetz mike.krav...@oracle.com
---
fs/hugetlbfs/inode.c| 75 ++---
include/linux
to specify minimum size. (David Rientjes)
V1:
Comments from RFC addressed/incorporated
Mike Kravetz (4):
hugetlbfs: add minimum size tracking fields to subpool structure
hugetlbfs: add minimum size accounting to subpools
hugetlbfs: accept subpool min_size mount option and setup accordingly
. The routines now return
this global reserve count adjustment. This global adjusted
reserve count is then passed to the global accounting routine
hugetlb_acct_memory().
Signed-off-by: Mike Kravetz mike.krav...@oracle.com
---
mm/hugetlb.c | 115 ---
1
Update documentation for the hugetlbfs min_size mount option.
Signed-off-by: Mike Kravetz mike.krav...@oracle.com
---
Documentation/vm/hugetlbpage.txt | 21 ++---
1 file changed, 14 insertions(+), 7 deletions(-)
diff --git a/Documentation/vm/hugetlbpage.txt b/Documentation/vm
to this minimum. An additional
field (rsv_hpages) is used to track the number of pages reserved
to meet this minimum size. The hstate pointer in the subpool
is convenient to have when reserving and unreserving the pages.
Signed-off-by: Mike Kravetz mike.krav...@oracle.com
---
include/linux/hugetlb.h | 2
On 03/18/2015 02:41 PM, Andrew Morton wrote:
On Mon, 16 Mar 2015 16:53:29 -0700 Mike Kravetz mike.krav...@oracle.com wrote:
Update documentation for the hugetlbfs min_size mount option.
Signed-off-by: Mike Kravetz mike.krav...@oracle.com
---
Documentation/vm/hugetlbpage.txt | 21
On 03/18/2015 02:40 PM, Andrew Morton wrote:
On Mon, 16 Mar 2015 16:53:28 -0700 Mike Kravetz mike.krav...@oracle.com wrote:
Make 'min_size=' be an option when mounting a hugetlbfs. This option
takes the same value as the 'size' option. min_size can be specified
with specifying size. If both
On 03/18/2015 07:23 PM, Andrew Morton wrote:
On Wed, 18 Mar 2015 18:51:22 -0700 Mike Kravetz mike.krav...@oracle.com wrote:
Nowhere here is the reader told the units of size. We should at
least describe that, and maybe even rename the thing to min_bytes.
Ok, I will add that the size
. The routines now return
this global reserve count adjustment. This global reserve count
adjustment is then passed to the global accounting routine
hugetlb_acct_memory().
Signed-off-by: Mike Kravetz mike.krav...@oracle.com
---
mm/hugetlb.c | 123
to specify minimum size. Suggsted by David Rientjes
V1:
Comments from RFC addressed/incorporated
Mike Kravetz (4):
hugetlbfs: add minimum size tracking fields to subpool structure
hugetlbfs: add minimum size accounting to subpools
hugetlbfs: accept subpool min_size mount option and setup
, then at mount time an attempt is made to reserve
min_size pages. If the reservation fails, the mount fails. At umount
time, the reserved pages are released.
Signed-off-by: Mike Kravetz mike.krav...@oracle.com
---
fs/hugetlbfs/inode.c| 90 ++---
include
Add min_size mount option to the hugetlbfs documentation. Also,
add the missing pagesize option and mention that size can be
specified as bytes or a percentage of huge page pool.
Signed-off-by: Mike Kravetz mike.krav...@oracle.com
---
Documentation/vm/hugetlbpage.txt | 31
to this minimum. An additional
field (rsv_hpages) is used to track the number of pages reserved
to meet this minimum size. The hstate pointer in the subpool
is convenient to have when reserving and unreserving the pages.
Signed-off-by: Mike Kravetz mike.krav...@oracle.com
---
include/linux/hugetlb.h | 8
On 03/06/2015 07:10 AM, Michal Hocko wrote:
On Mon 02-03-15 17:18:14, Mike Kravetz wrote:
On 03/02/2015 03:10 PM, Andrew Morton wrote:
On Fri, 27 Feb 2015 14:58:08 -0800 Mike Kravetz mike.krav...@oracle.com wrote:
hugetlbfs allocates huge pages from the global pool as needed. Even
On 03/06/2015 01:14 PM, David Rientjes wrote:
On Fri, 6 Mar 2015, Mike Kravetz wrote:
Thanks for the CONFIG_CGROUP_HUGETLB suggestion, however I do not
believe this will be a satisfactory solution for my usecase. As you
point out, cgroups could be set up (by a sysadmin) for every hugetlb
user
On 03/02/2015 03:10 PM, Andrew Morton wrote:
On Fri, 27 Feb 2015 14:58:10 -0800 Mike Kravetz mike.krav...@oracle.com wrote:
Add a boolean to the subpool structure to indicate that the pages for
subpool have been reserved. The hstate pointer in the subpool is
convienient to have when it comes
On 03/02/2015 03:10 PM, Andrew Morton wrote:
On Fri, 27 Feb 2015 14:58:08 -0800 Mike Kravetz mike.krav...@oracle.com wrote:
hugetlbfs allocates huge pages from the global pool as needed. Even if
the global pool contains a sufficient number pages for the filesystem
size at mount time, those
On 03/02/2015 03:10 PM, Andrew Morton wrote:
On Fri, 27 Feb 2015 14:58:13 -0800 Mike Kravetz mike.krav...@oracle.com wrote:
Make reserved be an option when mounting a hugetlbfs.
New mount option triggers a user documentation update. hugetlbfs isn't
well documented, but Documentation/vm
On 03/02/2015 03:10 PM, Andrew Morton wrote:
On Fri, 27 Feb 2015 14:58:11 -0800 Mike Kravetz mike.krav...@oracle.com wrote:
If the pages for a subpool are reserved, then the reservations have
already been accounted for in the global pool. Therefore, when
requesting a new reservation
On 03/03/2015 09:49 PM, David Rientjes wrote:
On Tue, 3 Mar 2015, Mike Kravetz wrote:
Add a new hugetlbfs mount option 'reserved' to specify that the number
of pages associated with the size of the filesystem will be reserved. If
there are insufficient pages, the mount will fail
not adjust the global
count. However, when actually allocating or freeing a hugepage
be sure to adjust the global reserve count so that it corresponds
with the global free count.
Signed-off-by: Mike Kravetz mike.krav...@oracle.com
---
mm/hugetlb.c | 36
1 file
Update documentation for the hugetlbfs reserved mount option.
Signed-off-by: Mike Kravetz mike.krav...@oracle.com
---
Documentation/vm/hugetlbpage.txt | 18 +++---
1 file changed, 11 insertions(+), 7 deletions(-)
diff --git a/Documentation/vm/hugetlbpage.txt b/Documentation/vm
Make reserved be an option when mounting a hugetlbfs. reserved
option is only possible if size option is also specified, otherwise
the mount will fail. On mount, reserve size hugepages from the
global pool and note in subpool. Unreserve hugepages when fs
is unmounted.
Signed-off-by: Mike
.
Signed-off-by: Mike Kravetz mike.krav...@oracle.com
---
include/linux/hugetlb.h | 6 ++
mm/hugetlb.c| 2 ++
2 files changed, 8 insertions(+)
diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index 431b7fc..12fbd5d 100644
--- a/include/linux/hugetlb.h
+++ b/include
are
allocated and free'ed a sufficient number of pages remains reserved.
Comments from RFC addressed/incorporated
Mike Kravetz (4):
hugetlbfs: add reserved mount fields to subpool structure
hugetlbfs: coordinate global and subpool reserve accounting
hugetlbfs: accept subpool reserved option
correspondingly.
Hillf
Thanks Hillf. I'll also take a look at other comments in the area
of 'accounting'. As I discovered, it is only a matter of adjusting
the accounting to support reservation of pages for the entire filesystem.
--
Mike Kravetz
- ret = hugetlb_acct_memory(h, chg
decrement gobal reserve count to correspond to
with decrement in global free pages.
Signed-off-by: Mike Kravetz mike.krav...@oracle.com
---
mm/hugetlb.c | 20 +---
1 file changed, 13 insertions(+), 7 deletions(-)
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index c6adf65..4ef8379 100644
and free'ed a sufficient number of pages remains reserved.
Mike Kravetz (3):
hugetlbfs: add reserved mount fields to subpool structure
hugetlbfs: coordinate global and subpool reserve accounting
hugetlbfs: accept subpool reserved option and setup accordingly
fs/hugetlbfs/inode.c| 15
-off-by: Mike Kravetz mike.krav...@oracle.com
---
include/linux/hugetlb.h | 6 ++
mm/hugetlb.c| 2 ++
2 files changed, 8 insertions(+)
diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index 431b7fc..605c648 100644
--- a/include/linux/hugetlb.h
+++ b/include/linux
Make reserved be an option when mounting a hugetlbfs. reserved
option is only possible if size option is also specified. On mount,
reserve size hugepages and note in subpool. Unreserve pages when
fs is unmounted.
Signed-off-by: Mike Kravetz mike.krav...@oracle.com
---
fs/hugetlbfs/inode.c
decrement global reserve count to correspond to
with decrement in global free pages.
Signed-off-by: Mike Kravetz mike.krav...@oracle.com
---
mm/hugetlb.c | 20 +---
1 file changed, 13 insertions(+), 7 deletions(-)
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index c6adf65..4ef8379 100644
-off-by: Mike Kravetz mike.krav...@oracle.com
---
include/linux/hugetlb.h | 6 ++
mm/hugetlb.c| 2 ++
2 files changed, 8 insertions(+)
diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index 431b7fc..605c648 100644
--- a/include/linux/hugetlb.h
+++ b/include/linux
On 03/06/2015 02:13 PM, Andi Kleen wrote:
Mike Kravetz mike.krav...@oracle.com writes:
hugetlbfs allocates huge pages from the global pool as needed. Even if
the global pool contains a sufficient number pages for the filesystem
size at mount time, those global pages could be grabbed for some
it is currently
implemented using fallocate(). MADV_REMOVE lets madvise() remove
pages from the middle of a hugetlbfs file, which wasn't possible
before.
hugetlbfs fallocate only operates on whole huge pages.
Based-on code-by: Dave Hansen dave.han...@linux.intel.com
Signed-off-by: Mike Kravetz
Now that we have hole punching support for hugetlbfs, we can
also support the MADV_REMOVE interface to it.
Signed-off-by: Dave Hansen dave.han...@linux.intel.com
Signed-off-by: Mike Kravetz mike.krav...@oracle.com
---
mm/madvise.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git
Now that region_del() exists, the region_truncate() routine can be
removed. Callers of region_truncate are changed to call region_del
instead with a ending value of -1.
Signed-off-by: Mike Kravetz mike.krav...@oracle.com
---
mm/hugetlb.c | 37 +
1 file
Currently, there is only a single place where hugetlbfs pages are
added to the page cache. The new fallocate code be adding a second
one, so break the functionality out into its own helper.
Signed-off-by: Dave Hansen dave.han...@linux.intel.com
Signed-off-by: Mike Kravetz mike.krav
.
Based-on code-by: Dave Hansen dave.han...@linux.intel.com
Signed-off-by: Mike Kravetz mike.krav...@oracle.com
---
fs/hugetlbfs/inode.c| 31 +++-
include/linux/hugetlb.h | 3 +-
mm/hugetlb.c| 76 +++--
3 files changed, 100
noticed by Hillf Danton
New region_del() routine for region tracking/resv_map of ranges
Fixed several issues found during more extensive testing
Error handling in region_del() when kmalloc() fails stills needs
to be addressed
madvise remove support remains
Mike Kravetz (5
.
Signed-off-by: Mike Kravetz mike.krav...@oracle.com
---
mm/hugetlb.c | 37 +
1 file changed, 33 insertions(+), 4 deletions(-)
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 7f64034..63f6d43 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -1374,13 +1374,16 @@ static
at the same another task is mapping the
same region without the MAP_NORESERVE flag.
The patch set does not prevent the race from happening. Rather, it adds
simple functionality to detect when the race has occurred. If a race is
detected, then the incorrect counts are adjusted.
Mike Kravetz (2
of region_add(). The special
case return values of vma_needs_reservation() should also be
taken into account when determining the return value of
vma_commit_reservation().
Signed-off-by: Mike Kravetz mike.krav...@oracle.com
---
mm/hugetlb.c | 19 +++
1 file changed, 15 insertions(+), 4
value).
cc'ing some people from the recent hugetlb munmap alignment thread as
I'm sure they will have an opinion here.
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, and ideally would like to release them back to
the subpool or global pools for other uses. The fallocate() system
call provides an interface for preallocation and hole punching within
files. This patch set adds fallocate functionality to hugetlbfs.
Mike Kravetz (4):
hugetlbfs: truncate_hugepages() takes
Signed-off-by: Mike Kravetz mike.krav...@oracle.com
---
fs/hugetlbfs/inode.c | 25 +
1 file changed, 21 insertions(+), 4 deletions(-)
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index c274aca..d5b67fd 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
Currently, there is only a single place where hugetlbfs pages are
added to the page cache. The new fallocate code be adding a second
one, so break the functionality out into its own helper.
Signed-off-by: Dave Hansen dave.han...@linux.intel.com
Signed-off-by: Mike Kravetz mike.krav
it is currently
implemented using fallocate(). MADV_REMOVE lets us remove data
from the middle of a hugetlbfs file, which wasn't possible before.
hugetlbfs fallocate only operates on whole huge pages.
Based-on code-by: Dave Hansen dave.han...@linux.intel.com
Signed-off-by: Mike Kravetz mike.krav
Now that we have hole punching support for hugetlbfs, we can
also support the MADV_REMOVE interface to it.
Signed-off-by: Dave Hansen dave.han...@linux.intel.com
Signed-off-by: Mike Kravetz mike.krav...@oracle.com
---
mm/madvise.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git
()
+* unlock_page because locked by add_to_page_cache()
+*/
+ put_page(page);
Still needed if EEXIST?
Nope. Good catch.
I'll fix this in the next version.
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On 04/17/2015 12:10 AM, Hillf Danton wrote:
Now that we have hole punching support for hugetlbfs, we can
also support the MADV_REMOVE interface to it.
Signed-off-by: Dave Hansen dave.han...@linux.intel.com
Signed-off-by: Mike Kravetz mike.krav...@oracle.com
---
mm/madvise.c | 2 +-
1 file
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