der SAS
controller and hdds under AHCI controller but obviously not covers all.
Not sure if passthrough request can still escape into IO scheduler from
blk_mq_sched_insert_requests, which is used by blk_mq_flush_plug_list and
has lots of indirect callers.)
Signed-off-by: Lin Feng
---
block/
troduce a new wrapper to make code not that ugly.
Signed-off-by: Lin Feng
---
block/blk-mq.c | 3 ++-
include/linux/blkdev.h | 6 ++
2 files changed, 8 insertions(+), 1 deletion(-)
diff --git a/block/blk-mq.c b/block/blk-mq.c
index d4d7c1caa439..927189a55575 100644
--- a/block/blk-mq.c
++
Hi all,
On 2/2/21 22:20, Jens Axboe wrote:
On 2/2/21 5:28 AM, Jan Kara wrote:
Hello!
On Fri 29-01-21 19:18:08, Lin Feng wrote:
This reverts commit 6d4d273588378c65915acaf7b2ee74e9dd9c130a.
bfq.limit_depth passes word_depths[] as shallow_depth down to sbitmap core
sbitmap_get_shallow, which
des for bfq's word_depths array are not necessary and one
variable is enough.
But IMHO async depth limitation for slow drivers is essential, which is what we
always did in cfq age.
On 1/29/21 19:18, Lin Feng wrote:
This reverts commit 6d4d273588378c65915acaf7b2ee74e9dd9c130a.
bfq.limit_de
:
Physical KASLR disabled: no suitable memory region!
To enable physical kaslr with kexec, call process_e820_entries when
no suitable regions in efi memmaps.
Signed-off-by: Lin Feng
---
I find a regular of Kernel code and data placement with kexec. It
seems unsafe. The reason is showed above.
I'm
vfs_cache_pressure and zone_reclaim_mode, -1 is apparently not
a valid value, but we can set to them. And then kernel may crash.
# echo -1 > /proc/sys/vm/vfs_cache_pressure
Signed-off-by: Lin Feng
---
kernel/sysctl.c | 8
1 file changed, 4 insertions(+), 4 deletions(-)
diff --
we used a half done value
of zone->managed_pages before, or should we use a smaller factor(<10%) in
previous formula.
Signed-off-by: Lin Feng
---
init/main.c | 2 --
mm/page_alloc.c | 3 +++
2 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/init/main.c b/init/main.c
index 2
On 9/19/19 11:49, Matthew Wilcox wrote:
On Thu, Sep 19, 2019 at 10:33:10AM +0800, Lin Feng wrote:
On 9/18/19 20:33, Michal Hocko wrote:
I absolutely agree here. From you changelog it is also not clear what is
the underlying problem. Both congestion_wait and wait_iff_congested
should wake up
On 9/18/19 20:33, Michal Hocko wrote:
+mm_reclaim_congestion_wait_jiffies
+==
+
+This control is used to define how long kernel will wait/sleep while
+system memory is under pressure and memroy reclaim is relatively active.
+Lower values will decrease the kernel wait/sleep time.
+
Hi,
On 9/18/19 19:38, Matthew Wilcox wrote:
On Wed, Sep 18, 2019 at 11:21:04AM +0800, Lin Feng wrote:
Adding a new tunable is not the right solution. The right way is
to make Linux auto-tune itself to avoid the problem. For example,
bdi_writeback contains an estimated write bandwidth
On 9/18/19 20:27, Michal Hocko wrote:
Please do not post a new version with a minor compile fixes until there
is a general agreement on the approach. Willy had comments which really
need to be resolved first.
Sorry, but thanks for pointing out.
Also does this
[...]
Reported-by: kbuild
of this patch.
Signed-off-by: Lin Feng
Reported-by: kbuild test robot
---
Documentation/admin-guide/sysctl/vm.rst | 17 +
kernel/sysctl.c | 10 ++
mm/vmscan.c | 14 +++---
3 files changed, 38 insertions(+), 3 deletions
On 9/17/19 20:06, Matthew Wilcox wrote:
On Tue, Sep 17, 2019 at 07:58:24PM +0800, Lin Feng wrote:
In direct and background(kswapd) pages reclaim paths both may fall into
calling msleep(100) or congestion_wait(HZ/10) or wait_iff_congested(HZ/10)
while under IO pressure, and the sleep length
%hi, 0.3%si, 0.0%st
Cpu22 : 1.0%us, 1.0%sy, 0.0%ni, 98.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu23 : 0.7%us, 0.3%sy, 0.0%ni, 98.3%id, 0.0%wa, 0.0%hi, 0.7%si, 0.0%st
Signed-off-by: Lin Feng
---
Documentation/admin-guide/sysctl/vm.rst | 17 +
kernel/sysctl.c
ion
clear_global_latency_tracing.
Notes: These changes only visible to users who sets CONFIG_LATENCYTOP and
won't change user tool latencytop's behaviors.
Signed-off-by: Lin Feng
---
kernel/latencytop.c | 6 --
1 file changed, 6 deletions(-)
diff --git a/kernel/latencytop.c b/kernel/latencytop.c
index 9e794b497
The name clear_all_latency_tracing is misleading, in fact which only
clear per task's latency_record[], and we do have another function
named clear_global_latency_tracing which clear the global
latency_record[] buffer.
Signed-off-by: Lin Feng
---
fs/proc/base.c | 2 +-
include/linux
Hi Andreas,
Thanks for your reply and review.
On 06/08/2016 05:01 AM, Andreas Dilger wrote:
On Jun 2, 2016, at 6:01 AM, Lin Feng <l...@chinanetcenter.com> wrote:
Descriptions:
ext4 block allocation core stack:
ext4_mb_new_blocks
ext4_mb_normalize_request
ext4_mb_regular_all
Hi Andreas,
Thanks for your reply and review.
On 06/08/2016 05:01 AM, Andreas Dilger wrote:
On Jun 2, 2016, at 6:01 AM, Lin Feng wrote:
Descriptions:
ext4 block allocation core stack:
ext4_mb_new_blocks
ext4_mb_normalize_request
ext4_mb_regular_allocator
ext4_mb_find_by_goal
ation mode")
and the comments for MB_DEFAULT_STREAM_THRESHOLD became stale.
Signed-off-by: Lin Feng <l...@chinanetcenter.com>
---
fs/ext4/mballoc.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/fs/ext4/mballoc.h b/fs/ext4/mballoc.h
index 3ef1df6..2e64c0e 1006
ation mode")
and the comments for MB_DEFAULT_STREAM_THRESHOLD became stale.
Signed-off-by: Lin Feng
---
fs/ext4/mballoc.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/fs/ext4/mballoc.h b/fs/ext4/mballoc.h
index 3ef1df6..2e64c0e 100644
--- a/fs/ext4/mballoc.h
+++
HINT_MERGE is only tested once and nowhere teaches how to use it.
IIUC it also should be folded into EXT4_MB_HINT_TRY_GOAL path or simply skip
EXT4_MB_HINT_MERGE test at -L1871.
thanks,
linfeng
On 06/02/2016 08:01 PM, Lin Feng wrote:
Descriptions:
ext4 block allocation core stack:
HINT_MERGE is only tested once and nowhere teaches how to use it.
IIUC it also should be folded into EXT4_MB_HINT_TRY_GOAL path or simply skip
EXT4_MB_HINT_MERGE test at -L1871.
thanks,
linfeng
On 06/02/2016 08:01 PM, Lin Feng wrote:
Descriptions:
ext4 block allocation core stack:
le may get fragments even if the physical blocks in the hole is free,
which is expected to be merged into a single extent.
Signed-off-by: Lin Feng <l...@chinanetcenter.com>
---
fs/ext4/mballoc.c | 8
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/fs/ext4/mballoc
le may get fragments even if the physical blocks in the hole is free,
which is expected to be merged into a single extent.
Signed-off-by: Lin Feng
---
fs/ext4/mballoc.c | 8
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index c1ab3ec..e
Hi will,
On 04/08/2013 06:55 PM, Will Deacon wrote:
> Given that we don't have NUMA support or memory-hotplug on arm64 yet, I'm
> not sure that this change makes much sense at the moment. early_pfn_to_nid
> will always return 0 and we only ever have one node.
>
> To be honest, I'm not sure what
Hi Yinghai,
On 04/09/2013 02:40 AM, Yinghai Lu wrote:
> On Mon, Apr 8, 2013 at 2:56 AM, Lin Feng wrote:
>> In hot add node(memory) case, vmemmap pages are always allocated from other
>> node,
>
> that is broken, and should be fixed.
> vmemmap should be on local no
Hi Andrew,
On 04/09/2013 04:55 AM, Andrew Morton wrote:
> On Mon, 8 Apr 2013 11:40:11 -0700 Yinghai Lu wrote:
>
>> On Mon, Apr 8, 2013 at 2:56 AM, Lin Feng wrote:
>>> In hot add node(memory) case, vmemmap pages are always allocated from other
>>> node,
>>
&g
Hi all,
On 04/08/2013 05:56 PM, Lin Feng wrote:
> diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
> index 474e28f..e2a7277 100644
> --- a/arch/x86/mm/init_64.c
> +++ b/arch/x86/mm/init_64.c
> @@ -1318,6 +1318,8 @@ vmemmap_populate(struct page *start_page, unsigned lo
In hot add node(memory) case, vmemmap pages are always allocated from other
node, but the current logic just skip vmemmap_verify check.
So we should also issue "potential offnode page_structs" warning messages
if we are the case
Lin Feng (2):
mm: vmemmap: x86: add vmemmap_verify che
Deacon
Cc: Arnd Bergmann
Cc: Tony Lindgren
Cc: Ben Hutchings
Cc: Andrew Morton
Reported-by: Yasuaki Ishimatsu
Signed-off-by: Lin Feng
---
arch/arm64/mm/mmu.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
index 70b8cd4..9f1e
ar
Cc: "H. Peter Anvin"
Cc: Yinghai Lu
Cc: Andrew Morton
Reported-by: Yasuaki Ishimatsu
Signed-off-by: Lin Feng
---
arch/x86/mm/init_64.c | 6 --
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 474e28f..e2a7277 1
...@linutronix.de
Cc: Ingo Molnar mi...@redhat.com
Cc: H. Peter Anvin h...@zytor.com
Cc: Yinghai Lu ying...@kernel.org
Cc: Andrew Morton a...@linux-foundation.org
Reported-by: Yasuaki Ishimatsu isimatu.yasu...@jp.fujitsu.com
Signed-off-by: Lin Feng linf...@cn.fujitsu.com
---
arch/x86/mm/init_64.c | 6
catalin.mari...@arm.com
Cc: Will Deacon will.dea...@arm.com
Cc: Arnd Bergmann a...@arndb.de
Cc: Tony Lindgren t...@atomide.com
Cc: Ben Hutchings b...@decadent.org.uk
Cc: Andrew Morton a...@linux-foundation.org
Reported-by: Yasuaki Ishimatsu isimatu.yasu...@jp.fujitsu.com
Signed-off-by: Lin Feng linf
In hot add node(memory) case, vmemmap pages are always allocated from other
node, but the current logic just skip vmemmap_verify check.
So we should also issue potential offnode page_structs warning messages
if we are the case
Lin Feng (2):
mm: vmemmap: x86: add vmemmap_verify check for hot
Hi all,
On 04/08/2013 05:56 PM, Lin Feng wrote:
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 474e28f..e2a7277 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -1318,6 +1318,8 @@ vmemmap_populate(struct page *start_page, unsigned long
size, int node
Hi Andrew,
On 04/09/2013 04:55 AM, Andrew Morton wrote:
On Mon, 8 Apr 2013 11:40:11 -0700 Yinghai Lu ying...@kernel.org wrote:
On Mon, Apr 8, 2013 at 2:56 AM, Lin Feng linf...@cn.fujitsu.com wrote:
In hot add node(memory) case, vmemmap pages are always allocated from other
node
Hi Yinghai,
On 04/09/2013 02:40 AM, Yinghai Lu wrote:
On Mon, Apr 8, 2013 at 2:56 AM, Lin Feng linf...@cn.fujitsu.com wrote:
In hot add node(memory) case, vmemmap pages are always allocated from other
node,
that is broken, and should be fixed.
vmemmap should be on local node even for hot
Hi will,
On 04/08/2013 06:55 PM, Will Deacon wrote:
Given that we don't have NUMA support or memory-hotplug on arm64 yet, I'm
not sure that this change makes much sense at the moment. early_pfn_to_nid
will always return 0 and we only ever have one node.
To be honest, I'm not sure what that
Hi Wanpeng,
On 04/02/2013 06:57 PM, Wanpeng Li wrote:
>> >PS. For clarifying calling chains are showed as follows:
>> >setup_arch()
>> > ...
>> > initmem_init()
>> >x86_numa_init()
>> > numa_init()
>> >numa_register_memblks()
>> > setup_node_data()
>> >
_early(pgdat->node_id,...)
...
zone_sizes_init()
free_area_init_nodes()
free_area_init_node()
pgdat->node_id = nid;
pgdat->node_start_pfn = node_start_pfn;
calculate_node_totalpages();
pgdat->node_spanned_pages = totalpages;
Signed-off-by: Lin Feng
---
()
free_area_init_nodes()
free_area_init_node()
pgdat-node_id = nid;
pgdat-node_start_pfn = node_start_pfn;
calculate_node_totalpages();
pgdat-node_spanned_pages = totalpages;
Signed-off-by: Lin Feng linf...@cn.fujitsu.com
---
arch/x86/mm/numa.c
Hi Wanpeng,
On 04/02/2013 06:57 PM, Wanpeng Li wrote:
PS. For clarifying calling chains are showed as follows:
setup_arch()
...
initmem_init()
x86_numa_init()
numa_init()
numa_register_memblks()
setup_node_data()
NODE_DATA(nid)-node_id = nid;
Hi Zhouping,
On 04/02/2013 11:09 AM, Zhouping Liu wrote:
> I don't understand clearly the last sentence 'you'll probably only get 100%
> hugepages only 1/512th of the time.'
> could you please explain more details about 'only 1/512th of the time'?
IIUC, thp size is 2M so it may be comprised of
Hi Zhouping,
On 04/02/2013 11:09 AM, Zhouping Liu wrote:
I don't understand clearly the last sentence 'you'll probably only get 100%
hugepages only 1/512th of the time.'
could you please explain more details about 'only 1/512th of the time'?
IIUC, thp size is 2M so it may be comprised of 512
Hi Bjorn and others,
On 03/28/2013 01:27 AM, Bjorn Helgaas wrote:
>> - printk(KERN_ERR "run of slot in ranges\n");
>> > + pr_err("%s: run out of slot in ranges\n",
>> > + __func__);
>> >
Hi Bjorn and others,
On 03/28/2013 01:27 AM, Bjorn Helgaas wrote:
- printk(KERN_ERR run of slot in ranges\n);
+ pr_err(%s: run out of slot in ranges\n,
+ __func__);
}
Hi,
On 03/25/2013 05:00 PM, Lenky Gao wrote:
> I have found a comment in function physflat_cpu_mask_to_apicid to explain why.
>
> static unsigned int physflat_cpu_mask_to_apicid(const struct cpumask *cpumask)
> {
> int cpu;
>
> /*
>* We're using fixed IRQ delivery, can only
Hi Andrew,
On 03/19/2013 02:52 AM, Yinghai Lu wrote:
> On Mon, Mar 18, 2013 at 3:21 AM, Lin Feng wrote:
>> Since add_range_with_merge() return the max none zero element of the array,
>> it's
>> suffice to use it to instruct clean_sort_range() to do the sort. Or the
&g
On 03/25/2013 02:46 PM, Lenky Gao wrote:
>> Do you mean on your old machine the irq will be distributed automatically
>> among the cpus set by smp_affinity?
>>
>
> Yes. My another machine's interrupts are as follows:
And without irqbalance service? It sounds weird to me..
thanks,
linfeng
>
>
On 03/25/2013 02:46 PM, Lenky Gao wrote:
Do you mean on your old machine the irq will be distributed automatically
among the cpus set by smp_affinity?
Yes. My another machine's interrupts are as follows:
And without irqbalance service? It sounds weird to me..
thanks,
linfeng
Hi Andrew,
On 03/19/2013 02:52 AM, Yinghai Lu wrote:
On Mon, Mar 18, 2013 at 3:21 AM, Lin Feng linf...@cn.fujitsu.com wrote:
Since add_range_with_merge() return the max none zero element of the array,
it's
suffice to use it to instruct clean_sort_range() to do the sort. Or the
former
Hi,
On 03/25/2013 05:00 PM, Lenky Gao wrote:
I have found a comment in function physflat_cpu_mask_to_apicid to explain why.
static unsigned int physflat_cpu_mask_to_apicid(const struct cpumask *cpumask)
{
int cpu;
/*
* We're using fixed IRQ delivery, can only return
Hi,
On 03/25/2013 11:44 AM, Lenky Gao wrote:
>> On 03/25/2013 11:18 AM, Lenky Gao wrote:
>>> The irqbalance service has been stopped.
>> So try start irqbalance to see what happen?
>> It should help to give what you want ;-)
>
> Using the irqbalance service to dynamically change the IRQ-bound?
Hi,
On 03/25/2013 11:18 AM, Lenky Gao wrote:
> The irqbalance service has been stopped.
So try start irqbalance to see what happen?
It should help to give what you want ;-)
thanks,
linfeng
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
Hi Gao,
On 03/25/2013 10:33 AM, Lenky Gao wrote:
> [root@localhost ~]# echo 6 > /proc/irq/25/smp_affinity
> [root@localhost ~]# cat /proc/irq/25/smp_affinity
> 06
Seems you bind the nic irq to second and third cpu for the bit mask
you set is 110, so now eth9's irq is working on the 3rd cpu.
On 03/24/2013 04:37 AM, Yinghai Lu wrote:
> +#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
> +int __init_memblock memblock_search_pfn_nid(unsigned long pfn,
> + unsigned long *start_pfn, unsigned long *end_pfn)
> +{
> + struct memblock_type *type =
> + int mid =
On 03/24/2013 04:37 AM, Yinghai Lu wrote:
+#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
+int __init_memblock memblock_search_pfn_nid(unsigned long pfn,
+ unsigned long *start_pfn, unsigned long *end_pfn)
+{
+ struct memblock_type *type = memblock.memory;
+ int mid =
Hi Gao,
On 03/25/2013 10:33 AM, Lenky Gao wrote:
[root@localhost ~]# echo 6 /proc/irq/25/smp_affinity
[root@localhost ~]# cat /proc/irq/25/smp_affinity
06
Seems you bind the nic irq to second and third cpu for the bit mask
you set is 110, so now eth9's irq is working on the 3rd cpu.
Have
Hi,
On 03/25/2013 11:18 AM, Lenky Gao wrote:
The irqbalance service has been stopped.
So try start irqbalance to see what happen?
It should help to give what you want ;-)
thanks,
linfeng
--
To unsubscribe from this list: send the line unsubscribe linux-kernel in
the body of a message to
Hi,
On 03/25/2013 11:44 AM, Lenky Gao wrote:
On 03/25/2013 11:18 AM, Lenky Gao wrote:
The irqbalance service has been stopped.
So try start irqbalance to see what happen?
It should help to give what you want ;-)
Using the irqbalance service to dynamically change the IRQ-bound? It's
seems
Also replace deprecated printk(KERN_ERR...) with pr_err() as suggested
by Yinghai, attaching the function name to provide plenty info.
Cc: Yinghai Lu
Signed-off-by: Lin Feng
---
kernel/range.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/kernel/range.c b/kernel/range.c
For x86 PUD_SHIFT is 30 and PMD_SHIFT is 21, so the consequence of
(PUD_SHIFT-PMD_SHIFT)/2 is 4. Update the comments to the code.
Cc: Yinghai Lu
Signed-off-by: Lin Feng
---
arch/x86/mm/init.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/mm/init.c b/arch/x86/mm
If we fall into that branch it means that there is a range fully covering the
subtract range, so it's suffice to return there if there isn't any other
overlapping ranges.
Also fix the broken phrase issued by printk.
Cc: Yinghai Lu
Signed-off-by: Lin Feng
---
kernel/range.c | 4 ++--
1 file
and it never depends on
nr_pfn_mapped.
Cc: Jacob Shin
Cc: Yinghai Lu
Signed-off-by: Lin Feng
---
arch/x86/mm/init.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
index 59b7fc4..55ae904 100644
--- a/arch/x86/mm/init.c
+++ b/arch/x86/mm/init.c
and it never depends on
nr_pfn_mapped.
Cc: Jacob Shin jacob.s...@amd.com
Cc: Yinghai Lu ying...@kernel.org
Signed-off-by: Lin Feng linf...@cn.fujitsu.com
---
arch/x86/mm/init.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
index 59b7fc4..55ae904
If we fall into that branch it means that there is a range fully covering the
subtract range, so it's suffice to return there if there isn't any other
overlapping ranges.
Also fix the broken phrase issued by printk.
Cc: Yinghai Lu ying...@kernel.org
Signed-off-by: Lin Feng linf...@cn.fujitsu.com
For x86 PUD_SHIFT is 30 and PMD_SHIFT is 21, so the consequence of
(PUD_SHIFT-PMD_SHIFT)/2 is 4. Update the comments to the code.
Cc: Yinghai Lu ying...@kernel.org
Signed-off-by: Lin Feng linf...@cn.fujitsu.com
---
arch/x86/mm/init.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff
Also replace deprecated printk(KERN_ERR...) with pr_err() as suggested
by Yinghai, attaching the function name to provide plenty info.
Cc: Yinghai Lu ying...@kernel.org
Signed-off-by: Lin Feng linf...@cn.fujitsu.com
---
kernel/range.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff
Hi Yasuaki,
On 03/06/2013 03:48 PM, Yasuaki Ishimatsu wrote:
> Hi Lin,
>
> IMHO, current implementation depends on luck. So even if system has
> many non movable memory, get_user_pages_non_movable() may not allocate
> non movable memory.
Sorry, I'm not quite understand here, since the to be
Hi Marek,
On 03/05/2013 02:57 PM, Marek Szyprowski wrote:
> Ensure that newly allocated pages, which are faulted in in FOLL_DURABLE
> mode comes from non-movalbe pageblocks, to workaround migration failures
> with Contiguous Memory Allocator.
snip
> @@ -2495,7 +2498,7 @@ static inline void
Hi Marek,
On 03/05/2013 02:57 PM, Marek Szyprowski wrote:
> @@ -2495,7 +2498,7 @@ static inline void cow_user_page(struct page *dst,
> struct page *src, unsigned lo
> */
> static int do_wp_page(struct mm_struct *mm, struct vm_area_struct *vma,
> unsigned long address, pte_t
Hi Marek,
On 03/05/2013 02:57 PM, Marek Szyprowski wrote:
@@ -2495,7 +2498,7 @@ static inline void cow_user_page(struct page *dst,
struct page *src, unsigned lo
*/
static int do_wp_page(struct mm_struct *mm, struct vm_area_struct *vma,
unsigned long address, pte_t
Hi Marek,
On 03/05/2013 02:57 PM, Marek Szyprowski wrote:
Ensure that newly allocated pages, which are faulted in in FOLL_DURABLE
mode comes from non-movalbe pageblocks, to workaround migration failures
with Contiguous Memory Allocator.
snip
@@ -2495,7 +2498,7 @@ static inline void
Hi Yasuaki,
On 03/06/2013 03:48 PM, Yasuaki Ishimatsu wrote:
Hi Lin,
IMHO, current implementation depends on luck. So even if system has
many non movable memory, get_user_pages_non_movable() may not allocate
non movable memory.
Sorry, I'm not quite understand here, since the to be pinned
Hi Andrew, Mel and other guys,
How about this V3 patch, any comments?
thanks,
linfeng
On 02/21/2013 07:01 PM, Lin Feng wrote:
> get_user_pages() always tries to allocate pages from movable zone, which is
> not
> reliable to memory hotremove framework in some case.
>
> This p
Hi Andrew, Mel and other guys,
How about this V3 patch, any comments?
thanks,
linfeng
On 02/21/2013 07:01 PM, Lin Feng wrote:
get_user_pages() always tries to allocate pages from movable zone, which is
not
reliable to memory hotremove framework in some case.
This patch introduces a new
v1->v2:
Patch1:
- Fix the negative return value bug pointed out by Andrew and other
suggestions pointed out by Andrew and Jeff.
Patch2:
- Kill the CONFIG_MEMORY_HOTREMOVE dependence suggested by Jeff.
---
Lin Feng (2):
mm: hotplug: implement non-movable version of get_user_pages()
Cc: Zach Brown
Reviewed-by: Tang Chen
Reviewed-by: Gu Zheng
Signed-off-by: Lin Feng
---
include/linux/mm.h | 14 ++
include/linux/mmzone.h |4 ++
mm/memory.c| 103
mm/page_isolation.c|8
4 files changed
Morton
Cc: Jeff Moyer
Cc: Minchan Kim
Cc: Zach Brown
Reviewed-by: Tang Chen
Reviewed-by: Gu Zheng
Signed-off-by: Lin Feng
---
fs/aio.c |4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/fs/aio.c b/fs/aio.c
index 2512232..193e145 100644
--- a/fs/aio.c
+++ b/fs/aio.c
Viro v...@zeniv.linux.org.uk
Cc: Andrew Morton a...@linux-foundation.org
Cc: Jeff Moyer jmo...@redhat.com
Cc: Minchan Kim minc...@kernel.org
Cc: Zach Brown z...@redhat.com
Reviewed-by: Tang Chen tangc...@cn.fujitsu.com
Reviewed-by: Gu Zheng guz.f...@cn.fujitsu.com
Signed-off-by: Lin Feng linf
...@jp.fujitsu.com
Cc: Yasuaki Ishimatsu isimatu.yasu...@jp.fujitsu.com
Cc: Jeff Moyer jmo...@redhat.com
Cc: Minchan Kim minc...@kernel.org
Cc: Zach Brown z...@redhat.com
Reviewed-by: Tang Chen tangc...@cn.fujitsu.com
Reviewed-by: Gu Zheng guz.f...@cn.fujitsu.com
Signed-off-by: Lin Feng linf
-v2:
Patch1:
- Fix the negative return value bug pointed out by Andrew and other
suggestions pointed out by Andrew and Jeff.
Patch2:
- Kill the CONFIG_MEMORY_HOTREMOVE dependence suggested by Jeff.
---
Lin Feng (2):
mm: hotplug: implement non-movable version of get_user_pages() called
Hi Wanpeng,
On 02/20/2013 07:37 PM, Wanpeng Li wrote:
>> + * This function first calls get_user_pages() to get the candidate pages,
>> and
>> >+ * then check to ensure all pages are from non movable zone. Otherwise
>> >migrate
> How about "Otherwise migrate candidate pages which have already
On 02/20/2013 07:31 PM, Simon Jeons wrote:
> On 02/20/2013 06:23 PM, Lin Feng wrote:
>> Hi Simon,
>>
>> On 02/20/2013 05:58 PM, Simon Jeons wrote:
>>>> The other is that this almost certainly broken for transhuge page
>>>> handling. gup returns the
Hi Simon,
On 02/20/2013 05:58 PM, Simon Jeons wrote:
>
>>
>> The other is that this almost certainly broken for transhuge page
>> handling. gup returns the head and tail pages and ordinarily this is ok
>
> When need gup thp? in kvm case?
gup just pins the wanted pages(for x86 is 4k size) of
Hi Simon,
On 02/20/2013 05:58 PM, Simon Jeons wrote:
The other is that this almost certainly broken for transhuge page
handling. gup returns the head and tail pages and ordinarily this is ok
When need gup thp? in kvm case?
gup just pins the wanted pages(for x86 is 4k size) of user
On 02/20/2013 07:31 PM, Simon Jeons wrote:
On 02/20/2013 06:23 PM, Lin Feng wrote:
Hi Simon,
On 02/20/2013 05:58 PM, Simon Jeons wrote:
The other is that this almost certainly broken for transhuge page
handling. gup returns the head and tail pages and ordinarily this is ok
When need gup
Hi Wanpeng,
On 02/20/2013 07:37 PM, Wanpeng Li wrote:
+ * This function first calls get_user_pages() to get the candidate pages,
and
+ * then check to ensure all pages are from non movable zone. Otherwise
migrate
How about Otherwise migrate candidate pages which have already been
Hi Wanpeng,
On 02/20/2013 10:44 AM, Wanpeng Li wrote:
>> Sorry, I misunderstood what "tail pages" means, stupid question, just ignore
>> it.
>> >flee...
> According to the compound page, the first page of compound page is
> called head page, other sub pages are called tail pages.
>
> Regards,
>
On 02/19/2013 09:37 PM, Lin Feng wrote:
>> >
>> > The other is that this almost certainly broken for transhuge page
>> > handling. gup returns the head and tail pages and ordinarily this is ok
> I can't find codes doing such things :(, could you please point me
Hi Mel,
On 02/05/2013 09:32 PM, Mel Gorman wrote:
> On Tue, Feb 05, 2013 at 11:57:22AM +, Mel Gorman wrote:
>>
+ migrate_pre_flag = 1;
+ }
+
+ if (!isolate_lru_page(pages[i])) {
+
Hi Mel,
On 02/18/2013 11:17 PM, Mel Gorman wrote:
>>> > >
>>> > >
>>> > > result. It's a little clumsy but the memory hot-remove failure message
>>> > > could list what applications have pinned the pages that cannot be
>>> > > removed
>>> > > so the administrator has the option of force-killing
Hi Mel,
On 02/18/2013 11:17 PM, Mel Gorman wrote:
SNIP
result. It's a little clumsy but the memory hot-remove failure message
could list what applications have pinned the pages that cannot be
removed
so the administrator has the option of force-killing the application. It
is
Hi Mel,
On 02/05/2013 09:32 PM, Mel Gorman wrote:
On Tue, Feb 05, 2013 at 11:57:22AM +, Mel Gorman wrote:
+ migrate_pre_flag = 1;
+ }
+
+ if (!isolate_lru_page(pages[i])) {
+
On 02/19/2013 09:37 PM, Lin Feng wrote:
The other is that this almost certainly broken for transhuge page
handling. gup returns the head and tail pages and ordinarily this is ok
I can't find codes doing such things :(, could you please point me out?
Sorry, I misunderstood what tail
Hi Wanpeng,
On 02/20/2013 10:44 AM, Wanpeng Li wrote:
Sorry, I misunderstood what tail pages means, stupid question, just ignore
it.
flee...
According to the compound page, the first page of compound page is
called head page, other sub pages are called tail pages.
Regards,
Wanpeng Li
Hi Mel,
See below.
On 02/05/2013 07:57 PM, Mel Gorman wrote:
> On Mon, Feb 04, 2013 at 04:06:24PM -0800, Andrew Morton wrote:
>> The ifdefs aren't really needed here and I encourage people to omit
>> them. This keeps the header files looking neater and reduces the
>> chances of things later
Hi Mel,
See below.
On 02/05/2013 07:57 PM, Mel Gorman wrote:
On Mon, Feb 04, 2013 at 04:06:24PM -0800, Andrew Morton wrote:
The ifdefs aren't really needed here and I encourage people to omit
them. This keeps the header files looking neater and reduces the
chances of things later breaking
Morton
Cc: Jeff Moyer
Cc: Minchan Kim
Cc: Zach Brown
Reviewed-by: Tang Chen
Reviewed-by: Gu Zheng
Signed-off-by: Lin Feng
---
fs/aio.c |4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/fs/aio.c b/fs/aio.c
index 71f613c..f7a0d5c 100644
--- a/fs/aio.c
+++ b/fs/aio.c
Fix the negative return value bug pointed out by Andrew and other
suggestions pointed out by Andrew and Jeff.
Patch2:
- Kill the CONFIG_MEMORY_HOTREMOVE dependence suggested by Jeff.
---
Lin Feng (2):
mm: hotplug: implement non-movable version of get_user_pages() called
get_user_pages_non_mova
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