Re: [PATCH] mm, soft-offline: convert parameter to pfn
On Thu, Oct 17, 2019 at 10:03:21AM +0200, Oscar Salvador wrote: > On Thu, Oct 17, 2019 at 07:50:18AM +, Naoya Horiguchi wrote: > > Actually I guess that !pfn_valid() never happens when called from > > madvise_inject_error(), because madvise_inject_error() gets pfn via > > get_user_pages_fast() which only returns valid page for valid pfn. > > > > And we plan to remove MF_COUNT_INCREASED by Oscar's re-design work, > > so I start feeling that this patch should come on top of his tree. > > Hi Naoya, > > I am pretty much done with my testing. > If you feel like, I can take the patch and add it on top of [1] > , then I will do some more testing and, if nothing pops up, I will > send it upstream. Hi Oscar, Yes, please take it, thank you for speaking up. > > [1] https://github.com/leberus/linux/tree/hwpoison-v2
Re: [PATCH] mm, soft-offline: convert parameter to pfn
On 17.10.19 09:50, Naoya Horiguchi wrote:
On Thu, Oct 17, 2019 at 09:16:42AM +0200, David Hildenbrand wrote:
On 17.10.19 01:47, Naoya Horiguchi wrote:
On Wed, Oct 16, 2019 at 10:57:57AM +0200, David Hildenbrand wrote:
On 16.10.19 10:54, Naoya Horiguchi wrote:
On Wed, Oct 16, 2019 at 10:34:52AM +0200, David Hildenbrand wrote:
On 16.10.19 10:27, Naoya Horiguchi wrote:
On Wed, Oct 16, 2019 at 09:56:19AM +0200, David Hildenbrand wrote:
On 16.10.19 09:09, Naoya Horiguchi wrote:
Hi,
I wrote a simple cleanup for parameter of soft_offline_page(),
based on thread https://lkml.org/lkml/2019/10/11/57.
I know that we need more cleanup on hwpoison-inject, but I think
that will be mentioned in re-write patchset Oscar is preparing now.
So let me shared only this part as a separate one now.
...
I think you should rebase that patch on linux-next (where the
pfn_to_online_page() check is in place). I assume you'll want to move the
pfn_to_online_page() check into soft_offline_page() then as well?
I rebased to next-20191016. And yes, we will move pfn_to_online_page()
into soft offline code. It seems that we can also move pfn_valid(),
but is simply moving like below good enough for you?
At least I can't am the patch to current next/master (due to
pfn_to_online_page()).
Could also be that my "git am" skills failed as the mail was not a
proper patch itself :)
Sorry for the inconvenience, my company email system breaks original
message by introducing quoted-printable format ('=20' or '=3D').
Most mail client usually handles it but git-am doesn't.
I give up using it and send via smtp.gmail.com.
@@ -1877,11 +1877,17 @@ static int soft_offline_free_page(struct page *page)
* This is not a 100% solution for all memory, but tries to be
* ``good enough'' for the majority of memory.
*/
-int soft_offline_page(struct page *page, int flags)
+int soft_offline_page(unsigned long pfn, int flags)
{
int ret;
- unsigned long pfn = page_to_pfn(page);
+ struct page *page;
+ if (!pfn_valid(pfn))
+ return -ENXIO;
+ /* Only online pages can be soft-offlined (esp., not ZONE_DEVICE). */
+ page = pfn_to_online_page(pfn);
+ if (!page)
+ return -EIO;
if (is_zone_device_page(page)) {
-> this is now no longer possible! So you can drop the whole if
(is_zone_device) case
OK, thanks. I updated it.
Thanks,
Naoya Horiguchi
---
From 5faf227839b578726fe7f5ff414a153abb3b3a31 Mon Sep 17 00:00:00 2001
From: Naoya Horiguchi
Date: Thu, 17 Oct 2019 08:40:53 +0900
Subject: [PATCH] mm, soft-offline: convert parameter to pfn
Currently soft_offline_page() receives struct page, and its sibling
memory_failure() receives pfn. This discrepancy looks weird and makes
precheck on pfn validity tricky. So let's align them.
Signed-off-by: Naoya Horiguchi
---
drivers/base/memory.c | 7 +--
include/linux/mm.h| 2 +-
mm/madvise.c | 2 +-
mm/memory-failure.c | 19 +--
4 files changed, 12 insertions(+), 18 deletions(-)
diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index 55907c27075b..a757d9ed88a7 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -538,12 +538,7 @@ static ssize_t soft_offline_page_store(struct device *dev,
if (kstrtoull(buf, 0, ) < 0)
return -EINVAL;
pfn >>= PAGE_SHIFT;
- if (!pfn_valid(pfn))
- return -ENXIO;
- /* Only online pages can be soft-offlined (esp., not ZONE_DEVICE). */
- if (!pfn_to_online_page(pfn))
- return -EIO;
- ret = soft_offline_page(pfn_to_page(pfn), 0);
+ ret = soft_offline_page(pfn, 0);
return ret == 0 ? count : ret;
}
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 44d058723db9..fd360d208346 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2794,7 +2794,7 @@ extern int sysctl_memory_failure_early_kill;
extern int sysctl_memory_failure_recovery;
extern void shake_page(struct page *p, int access);
extern atomic_long_t num_poisoned_pages __read_mostly;
-extern int soft_offline_page(struct page *page, int flags);
+extern int soft_offline_page(unsigned long pfn, int flags);
/*
diff --git a/mm/madvise.c b/mm/madvise.c
index 2be9f3fdb05e..99dd06fecfa9 100644
--- a/mm/madvise.c
+++ b/mm/madvise.c
@@ -887,7 +887,7 @@ static int madvise_inject_error(int behavior,
pr_info("Soft offlining pfn %#lx at process virtual address
%#lx\n",
pfn, start);
- ret = soft_offline_page(page, MF_COUNT_INCREASED);
+ ret = soft_offline_page(pfn, MF_COUNT_INCREASED);
if (ret)
return ret;
continue;
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 05c8c6df25e6..af2712004a4d 100644
--- a/mm/memory-failure.c
+++
Re: [PATCH] mm, soft-offline: convert parameter to pfn
On Thu, Oct 17, 2019 at 07:50:18AM +, Naoya Horiguchi wrote: > Actually I guess that !pfn_valid() never happens when called from > madvise_inject_error(), because madvise_inject_error() gets pfn via > get_user_pages_fast() which only returns valid page for valid pfn. > > And we plan to remove MF_COUNT_INCREASED by Oscar's re-design work, > so I start feeling that this patch should come on top of his tree. Hi Naoya, I am pretty much done with my testing. If you feel like, I can take the patch and add it on top of [1] , then I will do some more testing and, if nothing pops up, I will send it upstream. [1] https://github.com/leberus/linux/tree/hwpoison-v2 > > Thanks, > Naoya Horiguchi -- Oscar Salvador SUSE L3
Re: [PATCH] mm, soft-offline: convert parameter to pfn
On Thu, Oct 17, 2019 at 09:16:42AM +0200, David Hildenbrand wrote:
> On 17.10.19 01:47, Naoya Horiguchi wrote:
> > On Wed, Oct 16, 2019 at 10:57:57AM +0200, David Hildenbrand wrote:
> > > On 16.10.19 10:54, Naoya Horiguchi wrote:
> > > > On Wed, Oct 16, 2019 at 10:34:52AM +0200, David Hildenbrand wrote:
> > > > > On 16.10.19 10:27, Naoya Horiguchi wrote:
> > > > > > On Wed, Oct 16, 2019 at 09:56:19AM +0200, David Hildenbrand wrote:
> > > > > > > On 16.10.19 09:09, Naoya Horiguchi wrote:
> > > > > > > > Hi,
> > > > > > > >
> > > > > > > > I wrote a simple cleanup for parameter of soft_offline_page(),
> > > > > > > > based on thread https://lkml.org/lkml/2019/10/11/57.
> > > > > > > >
> > > > > > > > I know that we need more cleanup on hwpoison-inject, but I think
> > > > > > > > that will be mentioned in re-write patchset Oscar is preparing
> > > > > > > > now.
> > > > > > > > So let me shared only this part as a separate one now.
> > > > > > ...
> > > > > > >
> > > > > > > I think you should rebase that patch on linux-next (where the
> > > > > > > pfn_to_online_page() check is in place). I assume you'll want to
> > > > > > > move the
> > > > > > > pfn_to_online_page() check into soft_offline_page() then as well?
> > > > > >
> > > > > > I rebased to next-20191016. And yes, we will move
> > > > > > pfn_to_online_page()
> > > > > > into soft offline code. It seems that we can also move pfn_valid(),
> > > > > > but is simply moving like below good enough for you?
> > > > >
> > > > > At least I can't am the patch to current next/master (due to
> > > > > pfn_to_online_page()).
> > >
> > > Could also be that my "git am" skills failed as the mail was not a
> > > proper patch itself :)
> >
> > Sorry for the inconvenience, my company email system breaks original
> > message by introducing quoted-printable format ('=20' or '=3D').
> > Most mail client usually handles it but git-am doesn't.
> > I give up using it and send via smtp.gmail.com.
> >
> > > > @@ -1877,11 +1877,17 @@ static int soft_offline_free_page(struct page
> > > > *page)
> > > >* This is not a 100% solution for all memory, but tries to be
> > > >* ``good enough'' for the majority of memory.
> > > >*/
> > > > -int soft_offline_page(struct page *page, int flags)
> > > > +int soft_offline_page(unsigned long pfn, int flags)
> > > > {
> > > > int ret;
> > > > - unsigned long pfn = page_to_pfn(page);
> > > > + struct page *page;
> > > > + if (!pfn_valid(pfn))
> > > > + return -ENXIO;
> > > > + /* Only online pages can be soft-offlined (esp., not
> > > > ZONE_DEVICE). */
> > > > + page = pfn_to_online_page(pfn);
> > > > + if (!page)
> > > > + return -EIO;
> > > > if (is_zone_device_page(page)) {
> > >
> > > -> this is now no longer possible! So you can drop the whole if
> > > (is_zone_device) case
> >
> > OK, thanks. I updated it.
> >
> > Thanks,
> > Naoya Horiguchi
> > ---
> > From 5faf227839b578726fe7f5ff414a153abb3b3a31 Mon Sep 17 00:00:00 2001
> > From: Naoya Horiguchi
> > Date: Thu, 17 Oct 2019 08:40:53 +0900
> > Subject: [PATCH] mm, soft-offline: convert parameter to pfn
> >
> > Currently soft_offline_page() receives struct page, and its sibling
> > memory_failure() receives pfn. This discrepancy looks weird and makes
> > precheck on pfn validity tricky. So let's align them.
> >
> > Signed-off-by: Naoya Horiguchi
> > ---
> > drivers/base/memory.c | 7 +--
> > include/linux/mm.h| 2 +-
> > mm/madvise.c | 2 +-
> > mm/memory-failure.c | 19 +--
> > 4 files changed, 12 insertions(+), 18 deletions(-)
> >
> > diff --git a/drivers/base/memory.c b/drivers/base/memory.c
> > index 55907c27075b..a757d9ed88a7 100644
> > --- a/drivers/base/memory.c
> > +++ b/drivers/base/memory.c
> > @@ -538,12 +538,7 @@ static ssize_t soft_offline_page_store(struct device
&
Re: [PATCH] mm, soft-offline: convert parameter to pfn
On 17.10.19 01:47, Naoya Horiguchi wrote:
On Wed, Oct 16, 2019 at 10:57:57AM +0200, David Hildenbrand wrote:
On 16.10.19 10:54, Naoya Horiguchi wrote:
On Wed, Oct 16, 2019 at 10:34:52AM +0200, David Hildenbrand wrote:
On 16.10.19 10:27, Naoya Horiguchi wrote:
On Wed, Oct 16, 2019 at 09:56:19AM +0200, David Hildenbrand wrote:
On 16.10.19 09:09, Naoya Horiguchi wrote:
Hi,
I wrote a simple cleanup for parameter of soft_offline_page(),
based on thread https://lkml.org/lkml/2019/10/11/57.
I know that we need more cleanup on hwpoison-inject, but I think
that will be mentioned in re-write patchset Oscar is preparing now.
So let me shared only this part as a separate one now.
...
I think you should rebase that patch on linux-next (where the
pfn_to_online_page() check is in place). I assume you'll want to move the
pfn_to_online_page() check into soft_offline_page() then as well?
I rebased to next-20191016. And yes, we will move pfn_to_online_page()
into soft offline code. It seems that we can also move pfn_valid(),
but is simply moving like below good enough for you?
At least I can't am the patch to current next/master (due to
pfn_to_online_page()).
Could also be that my "git am" skills failed as the mail was not a
proper patch itself :)
Sorry for the inconvenience, my company email system breaks original
message by introducing quoted-printable format ('=20' or '=3D').
Most mail client usually handles it but git-am doesn't.
I give up using it and send via smtp.gmail.com.
@@ -1877,11 +1877,17 @@ static int soft_offline_free_page(struct page *page)
* This is not a 100% solution for all memory, but tries to be
* ``good enough'' for the majority of memory.
*/
-int soft_offline_page(struct page *page, int flags)
+int soft_offline_page(unsigned long pfn, int flags)
{
int ret;
- unsigned long pfn = page_to_pfn(page);
+ struct page *page;
+ if (!pfn_valid(pfn))
+ return -ENXIO;
+ /* Only online pages can be soft-offlined (esp., not ZONE_DEVICE). */
+ page = pfn_to_online_page(pfn);
+ if (!page)
+ return -EIO;
if (is_zone_device_page(page)) {
-> this is now no longer possible! So you can drop the whole if
(is_zone_device) case
OK, thanks. I updated it.
Thanks,
Naoya Horiguchi
---
From 5faf227839b578726fe7f5ff414a153abb3b3a31 Mon Sep 17 00:00:00 2001
From: Naoya Horiguchi
Date: Thu, 17 Oct 2019 08:40:53 +0900
Subject: [PATCH] mm, soft-offline: convert parameter to pfn
Currently soft_offline_page() receives struct page, and its sibling
memory_failure() receives pfn. This discrepancy looks weird and makes
precheck on pfn validity tricky. So let's align them.
Signed-off-by: Naoya Horiguchi
---
drivers/base/memory.c | 7 +--
include/linux/mm.h| 2 +-
mm/madvise.c | 2 +-
mm/memory-failure.c | 19 +--
4 files changed, 12 insertions(+), 18 deletions(-)
diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index 55907c27075b..a757d9ed88a7 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -538,12 +538,7 @@ static ssize_t soft_offline_page_store(struct device *dev,
if (kstrtoull(buf, 0, ) < 0)
return -EINVAL;
pfn >>= PAGE_SHIFT;
- if (!pfn_valid(pfn))
- return -ENXIO;
- /* Only online pages can be soft-offlined (esp., not ZONE_DEVICE). */
- if (!pfn_to_online_page(pfn))
- return -EIO;
- ret = soft_offline_page(pfn_to_page(pfn), 0);
+ ret = soft_offline_page(pfn, 0);
return ret == 0 ? count : ret;
}
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 44d058723db9..fd360d208346 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2794,7 +2794,7 @@ extern int sysctl_memory_failure_early_kill;
extern int sysctl_memory_failure_recovery;
extern void shake_page(struct page *p, int access);
extern atomic_long_t num_poisoned_pages __read_mostly;
-extern int soft_offline_page(struct page *page, int flags);
+extern int soft_offline_page(unsigned long pfn, int flags);
/*
diff --git a/mm/madvise.c b/mm/madvise.c
index 2be9f3fdb05e..99dd06fecfa9 100644
--- a/mm/madvise.c
+++ b/mm/madvise.c
@@ -887,7 +887,7 @@ static int madvise_inject_error(int behavior,
pr_info("Soft offlining pfn %#lx at process virtual address
%#lx\n",
pfn, start);
- ret = soft_offline_page(page, MF_COUNT_INCREASED);
+ ret = soft_offline_page(pfn, MF_COUNT_INCREASED);
if (ret)
return ret;
continue;
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 05c8c6df25e6..af2712004a4d 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1476,7 +1476,7 @@ static void memory_failure_work_func(struct work_struct
*work)
if (!gotte
Re: [PATCH] mm, soft-offline: convert parameter to pfn
On Wed, Oct 16, 2019 at 10:57:57AM +0200, David Hildenbrand wrote:
> On 16.10.19 10:54, Naoya Horiguchi wrote:
> >On Wed, Oct 16, 2019 at 10:34:52AM +0200, David Hildenbrand wrote:
> >>On 16.10.19 10:27, Naoya Horiguchi wrote:
> >>>On Wed, Oct 16, 2019 at 09:56:19AM +0200, David Hildenbrand wrote:
> >>>>On 16.10.19 09:09, Naoya Horiguchi wrote:
> >>>>>Hi,
> >>>>>
> >>>>>I wrote a simple cleanup for parameter of soft_offline_page(),
> >>>>>based on thread https://lkml.org/lkml/2019/10/11/57.
> >>>>>
> >>>>>I know that we need more cleanup on hwpoison-inject, but I think
> >>>>>that will be mentioned in re-write patchset Oscar is preparing now.
> >>>>>So let me shared only this part as a separate one now.
> >>>...
> >>>>
> >>>>I think you should rebase that patch on linux-next (where the
> >>>>pfn_to_online_page() check is in place). I assume you'll want to move the
> >>>>pfn_to_online_page() check into soft_offline_page() then as well?
> >>>
> >>>I rebased to next-20191016. And yes, we will move pfn_to_online_page()
> >>>into soft offline code. It seems that we can also move pfn_valid(),
> >>>but is simply moving like below good enough for you?
> >>
> >>At least I can't am the patch to current next/master (due to
> >>pfn_to_online_page()).
>
> Could also be that my "git am" skills failed as the mail was not a
> proper patch itself :)
Sorry for the inconvenience, my company email system breaks original
message by introducing quoted-printable format ('=20' or '=3D').
Most mail client usually handles it but git-am doesn't.
I give up using it and send via smtp.gmail.com.
> >@@ -1877,11 +1877,17 @@ static int soft_offline_free_page(struct page *page)
> > * This is not a 100% solution for all memory, but tries to be
> > * ``good enough'' for the majority of memory.
> > */
> >-int soft_offline_page(struct page *page, int flags)
> >+int soft_offline_page(unsigned long pfn, int flags)
> > {
> > int ret;
> >-unsigned long pfn = page_to_pfn(page);
> >+struct page *page;
> >+if (!pfn_valid(pfn))
> >+return -ENXIO;
> >+/* Only online pages can be soft-offlined (esp., not ZONE_DEVICE). */
> >+page = pfn_to_online_page(pfn);
> >+if (!page)
> >+return -EIO;
> > if (is_zone_device_page(page)) {
>
> -> this is now no longer possible! So you can drop the whole if
> (is_zone_device) case
OK, thanks. I updated it.
Thanks,
Naoya Horiguchi
---
>From 5faf227839b578726fe7f5ff414a153abb3b3a31 Mon Sep 17 00:00:00 2001
From: Naoya Horiguchi
Date: Thu, 17 Oct 2019 08:40:53 +0900
Subject: [PATCH] mm, soft-offline: convert parameter to pfn
Currently soft_offline_page() receives struct page, and its sibling
memory_failure() receives pfn. This discrepancy looks weird and makes
precheck on pfn validity tricky. So let's align them.
Signed-off-by: Naoya Horiguchi
---
drivers/base/memory.c | 7 +--
include/linux/mm.h| 2 +-
mm/madvise.c | 2 +-
mm/memory-failure.c | 19 +--
4 files changed, 12 insertions(+), 18 deletions(-)
diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index 55907c27075b..a757d9ed88a7 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -538,12 +538,7 @@ static ssize_t soft_offline_page_store(struct device *dev,
if (kstrtoull(buf, 0, ) < 0)
return -EINVAL;
pfn >>= PAGE_SHIFT;
- if (!pfn_valid(pfn))
- return -ENXIO;
- /* Only online pages can be soft-offlined (esp., not ZONE_DEVICE). */
- if (!pfn_to_online_page(pfn))
- return -EIO;
- ret = soft_offline_page(pfn_to_page(pfn), 0);
+ ret = soft_offline_page(pfn, 0);
return ret == 0 ? count : ret;
}
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 44d058723db9..fd360d208346 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2794,7 +2794,7 @@ extern int sysctl_memory_failure_early_kill;
extern int sysctl_memory_failure_recovery;
extern void shake_page(struct page *p, int access);
extern atomic_long_t num_poisoned_pages __read_mostly;
-extern int soft_offline_page(struct page *page, int flags);
+extern int soft_offline_page(unsigned long pfn, int flags);
/*
diff --git a/mm/madvise.c b/mm/madvise.c
index 2be9f3fdb05e..99dd06fecfa9 100644
--- a/mm/madvise.c
+++ b/mm/madvise.c
@@ -887,7 +887,7 @@ static int madvise_inject_error(int behavior,
pr_info("Soft offlining pfn %#lx at process virtual
address %#lx\n",
Re: [PATCH] mm, soft-offline: convert parameter to pfn
On 16.10.19 10:54, Naoya Horiguchi wrote:
On Wed, Oct 16, 2019 at 10:34:52AM +0200, David Hildenbrand wrote:
On 16.10.19 10:27, Naoya Horiguchi wrote:
On Wed, Oct 16, 2019 at 09:56:19AM +0200, David Hildenbrand wrote:
On 16.10.19 09:09, Naoya Horiguchi wrote:
Hi,
I wrote a simple cleanup for parameter of soft_offline_page(),
based on thread https://lkml.org/lkml/2019/10/11/57.
I know that we need more cleanup on hwpoison-inject, but I think
that will be mentioned in re-write patchset Oscar is preparing now.
So let me shared only this part as a separate one now.
...
I think you should rebase that patch on linux-next (where the
pfn_to_online_page() check is in place). I assume you'll want to move the
pfn_to_online_page() check into soft_offline_page() then as well?
I rebased to next-20191016. And yes, we will move pfn_to_online_page()
into soft offline code. It seems that we can also move pfn_valid(),
but is simply moving like below good enough for you?
At least I can't am the patch to current next/master (due to
pfn_to_online_page()).
Could also be that my "git am" skills failed as the mail was not a
proper patch itself :)
@@ -1877,11 +1877,17 @@ static int soft_offline_free_page(struct page *page)
* This is not a 100% solution for all memory, but tries to be
* ``good enough'' for the majority of memory.
*/
-int soft_offline_page(struct page *page, int flags)
+int soft_offline_page(unsigned long pfn, int flags)
{
int ret;
- unsigned long pfn = page_to_pfn(page);
+ struct page *page;
+ if (!pfn_valid(pfn))
+ return -ENXIO;
+ /* Only online pages can be soft-offlined (esp., not ZONE_DEVICE). */
+ if (!pfn_to_online_page(pfn))
+ return -EIO;
+ page = pfn_to_page(pfn);
if (is_zone_device_page(page)) {
pr_debug_ratelimited("soft_offline: %#lx page is device page\n",
pfn);
--
Or we might have an option to do as memory_failure() does like below:
In contrast to soft offlining, memory failure can deal with devmem. So I
think the above makes sense.
OK, so here's the revised one.
Thanks,
Naoya Horiguchi
---
From: Naoya Horiguchi
Date: Wed, 16 Oct 2019 17:00:33 +0900
Subject: [PATCH] mm, soft-offline: convert parameter to pfn
Currently soft_offline_page() receives struct page, and its sibling
memory_failure() receives pfn. This discrepancy looks weird and makes
precheck on pfn validity tricky. So let's align them.
Signed-off-by: Naoya Horiguchi
---
drivers/base/memory.c | 7 +--
include/linux/mm.h| 2 +-
mm/madvise.c | 2 +-
mm/memory-failure.c | 14 ++
4 files changed, 13 insertions(+), 12 deletions(-)
diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index 55907c27075b..a757d9ed88a7 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -538,12 +538,7 @@ static ssize_t soft_offline_page_store(struct device *dev,
if (kstrtoull(buf, 0, ) < 0)
return -EINVAL;
pfn >>= PAGE_SHIFT;
- if (!pfn_valid(pfn))
- return -ENXIO;
- /* Only online pages can be soft-offlined (esp., not ZONE_DEVICE). */
- if (!pfn_to_online_page(pfn))
- return -EIO;
- ret = soft_offline_page(pfn_to_page(pfn), 0);
+ ret = soft_offline_page(pfn, 0);
return ret == 0 ? count : ret;
}
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 44d058723db9..fd360d208346 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2794,7 +2794,7 @@ extern int sysctl_memory_failure_early_kill;
extern int sysctl_memory_failure_recovery;
extern void shake_page(struct page *p, int access);
extern atomic_long_t num_poisoned_pages __read_mostly;
-extern int soft_offline_page(struct page *page, int flags);
+extern int soft_offline_page(unsigned long pfn, int flags);
/*
diff --git a/mm/madvise.c b/mm/madvise.c
index 2be9f3fdb05e..99dd06fecfa9 100644
--- a/mm/madvise.c
+++ b/mm/madvise.c
@@ -887,7 +887,7 @@ static int madvise_inject_error(int behavior,
pr_info("Soft offlining pfn %#lx at process virtual address
%#lx\n",
pfn, start);
- ret = soft_offline_page(page, MF_COUNT_INCREASED);
+ ret = soft_offline_page(pfn, MF_COUNT_INCREASED);
if (ret)
return ret;
continue;
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 05c8c6df25e6..bdf408d7f65c 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1476,7 +1476,7 @@ static void memory_failure_work_func(struct work_struct
*work)
if (!gotten)
break;
if (entry.flags & MF_SOFT_OFFLINE)
- soft_offli
Re: [PATCH] mm, soft-offline: convert parameter to pfn
On Wed, Oct 16, 2019 at 10:34:52AM +0200, David Hildenbrand wrote:
> On 16.10.19 10:27, Naoya Horiguchi wrote:
> > On Wed, Oct 16, 2019 at 09:56:19AM +0200, David Hildenbrand wrote:
> > > On 16.10.19 09:09, Naoya Horiguchi wrote:
> > > > Hi,
> > > >
> > > > I wrote a simple cleanup for parameter of soft_offline_page(),
> > > > based on thread https://lkml.org/lkml/2019/10/11/57.
> > > >
> > > > I know that we need more cleanup on hwpoison-inject, but I think
> > > > that will be mentioned in re-write patchset Oscar is preparing now.
> > > > So let me shared only this part as a separate one now.
> > ...
> > >
> > > I think you should rebase that patch on linux-next (where the
> > > pfn_to_online_page() check is in place). I assume you'll want to move the
> > > pfn_to_online_page() check into soft_offline_page() then as well?
> >
> > I rebased to next-20191016. And yes, we will move pfn_to_online_page()
> > into soft offline code. It seems that we can also move pfn_valid(),
> > but is simply moving like below good enough for you?
>
> At least I can't am the patch to current next/master (due to
> pfn_to_online_page()).
>
> >
> >@@ -1877,11 +1877,17 @@ static int soft_offline_free_page(struct page
> > *page)
> > * This is not a 100% solution for all memory, but tries to be
> > * ``good enough'' for the majority of memory.
> > */
> >-int soft_offline_page(struct page *page, int flags)
> >+int soft_offline_page(unsigned long pfn, int flags)
> > {
> > int ret;
> >-unsigned long pfn = page_to_pfn(page);
> >+struct page *page;
> >+if (!pfn_valid(pfn))
> >+return -ENXIO;
> >+/* Only online pages can be soft-offlined (esp., not
> > ZONE_DEVICE). */
> >+if (!pfn_to_online_page(pfn))
> >+return -EIO;
> >+page = pfn_to_page(pfn);
> > if (is_zone_device_page(page)) {
> > pr_debug_ratelimited("soft_offline: %#lx page is device
> > page\n",
> > pfn);
> >--
> >
> > Or we might have an option to do as memory_failure() does like below:
>
> In contrast to soft offlining, memory failure can deal with devmem. So I
> think the above makes sense.
OK, so here's the revised one.
Thanks,
Naoya Horiguchi
---
From: Naoya Horiguchi
Date: Wed, 16 Oct 2019 17:00:33 +0900
Subject: [PATCH] mm, soft-offline: convert parameter to pfn
Currently soft_offline_page() receives struct page, and its sibling
memory_failure() receives pfn. This discrepancy looks weird and makes
precheck on pfn validity tricky. So let's align them.
Signed-off-by: Naoya Horiguchi
---
drivers/base/memory.c | 7 +--
include/linux/mm.h| 2 +-
mm/madvise.c | 2 +-
mm/memory-failure.c | 14 ++
4 files changed, 13 insertions(+), 12 deletions(-)
diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index 55907c27075b..a757d9ed88a7 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -538,12 +538,7 @@ static ssize_t soft_offline_page_store(struct device *dev,
if (kstrtoull(buf, 0, ) < 0)
return -EINVAL;
pfn >>= PAGE_SHIFT;
- if (!pfn_valid(pfn))
- return -ENXIO;
- /* Only online pages can be soft-offlined (esp., not ZONE_DEVICE). */
- if (!pfn_to_online_page(pfn))
- return -EIO;
- ret = soft_offline_page(pfn_to_page(pfn), 0);
+ ret = soft_offline_page(pfn, 0);
return ret == 0 ? count : ret;
}
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 44d058723db9..fd360d208346 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2794,7 +2794,7 @@ extern int sysctl_memory_failure_early_kill;
extern int sysctl_memory_failure_recovery;
extern void shake_page(struct page *p, int access);
extern atomic_long_t num_poisoned_pages __read_mostly;
-extern int soft_offline_page(struct page *page, int flags);
+extern int soft_offline_page(unsigned long pfn, int flags);
/*
diff --git a/mm/madvise.c b/mm/madvise.c
index 2be9f3fdb05e..99dd06fecfa9 100644
--- a/mm/madvise.c
+++ b/mm/madvise.c
@@ -887,7 +887,7 @@ static int madvise_inject_error(int behavior,
pr_info("Soft offlining pfn %#lx at process virtual
address %#lx\n",
pfn, start);
- ret = soft_offline_page(page, MF_COUNT_INCREASED);
+ ret = soft_offline_page(pfn, MF_COUNT_INCREASED);
if (ret)
Re: [PATCH] mm, soft-offline: convert parameter to pfn
On 16.10.19 10:27, Naoya Horiguchi wrote:
On Wed, Oct 16, 2019 at 09:56:19AM +0200, David Hildenbrand wrote:
On 16.10.19 09:09, Naoya Horiguchi wrote:
Hi,
I wrote a simple cleanup for parameter of soft_offline_page(),
based on thread https://lkml.org/lkml/2019/10/11/57.
I know that we need more cleanup on hwpoison-inject, but I think
that will be mentioned in re-write patchset Oscar is preparing now.
So let me shared only this part as a separate one now.
...
I think you should rebase that patch on linux-next (where the
pfn_to_online_page() check is in place). I assume you'll want to move the
pfn_to_online_page() check into soft_offline_page() then as well?
I rebased to next-20191016. And yes, we will move pfn_to_online_page()
into soft offline code. It seems that we can also move pfn_valid(),
but is simply moving like below good enough for you?
At least I can't am the patch to current next/master (due to
pfn_to_online_page()).
@@ -1877,11 +1877,17 @@ static int soft_offline_free_page(struct page *page)
* This is not a 100% solution for all memory, but tries to be
* ``good enough'' for the majority of memory.
*/
-int soft_offline_page(struct page *page, int flags)
+int soft_offline_page(unsigned long pfn, int flags)
{
int ret;
-unsigned long pfn = page_to_pfn(page);
+struct page *page;
+ if (!pfn_valid(pfn))
+return -ENXIO;
+/* Only online pages can be soft-offlined (esp., not ZONE_DEVICE). */
+if (!pfn_to_online_page(pfn))
+return -EIO;
+page = pfn_to_page(pfn);
if (is_zone_device_page(page)) {
pr_debug_ratelimited("soft_offline: %#lx page is device page\n",
pfn);
--
Or we might have an option to do as memory_failure() does like below:
In contrast to soft offlining, memory failure can deal with devmem. So I
think the above makes sense.
--
Thanks,
David / dhildenb
Re: [PATCH] mm, soft-offline: convert parameter to pfn
On Wed, Oct 16, 2019 at 09:56:19AM +0200, David Hildenbrand wrote:
> On 16.10.19 09:09, Naoya Horiguchi wrote:
> > Hi,
> >
> > I wrote a simple cleanup for parameter of soft_offline_page(),
> > based on thread https://lkml.org/lkml/2019/10/11/57.
> >
> > I know that we need more cleanup on hwpoison-inject, but I think
> > that will be mentioned in re-write patchset Oscar is preparing now.
> > So let me shared only this part as a separate one now.
...
>
> I think you should rebase that patch on linux-next (where the
> pfn_to_online_page() check is in place). I assume you'll want to move the
> pfn_to_online_page() check into soft_offline_page() then as well?
I rebased to next-20191016. And yes, we will move pfn_to_online_page()
into soft offline code. It seems that we can also move pfn_valid(),
but is simply moving like below good enough for you?
@@ -1877,11 +1877,17 @@ static int soft_offline_free_page(struct page *page)
* This is not a 100% solution for all memory, but tries to be
* ``good enough'' for the majority of memory.
*/
-int soft_offline_page(struct page *page, int flags)
+int soft_offline_page(unsigned long pfn, int flags)
{
int ret;
- unsigned long pfn = page_to_pfn(page);
+ struct page *page;
+ if (!pfn_valid(pfn))
+ return -ENXIO;
+ /* Only online pages can be soft-offlined (esp., not ZONE_DEVICE). */
+ if (!pfn_to_online_page(pfn))
+ return -EIO;
+ page = pfn_to_page(pfn);
if (is_zone_device_page(page)) {
pr_debug_ratelimited("soft_offline: %#lx page is device page\n",
pfn);
--
Or we might have an option to do as memory_failure() does like below:
int memory_failure(unsigned long pfn, int flags)
{
p = pfn_to_online_page(pfn);
if (!p) {
if (pfn_valid(pfn)) {
pgmap = get_dev_pagemap(pfn, NULL);
if (pgmap)
return memory_failure_dev_pagemap(pfn, flags,
pgmap);
}
pr_err("Memory failure: %#lx: memory outside kernel
control\n",
pfn);
return -ENXIO;
}
Thanks,
Naoya Horiguchi
Re: [PATCH] mm, soft-offline: convert parameter to pfn
On 16.10.19 09:09, Naoya Horiguchi wrote:
Hi,
I wrote a simple cleanup for parameter of soft_offline_page(),
based on thread https://lkml.org/lkml/2019/10/11/57.
I know that we need more cleanup on hwpoison-inject, but I think
that will be mentioned in re-write patchset Oscar is preparing now.
So let me shared only this part as a separate one now.
Thanks,
Naoya Horiguchi
---
From: Naoya Horiguchi
Date: Wed, 16 Oct 2019 15:49:00 +0900
Subject: [PATCH] mm, soft-offline: convert parameter to pfn
Currently soft_offline_page() receives struct page, and its sibling
memory_failure() receives pfn. This discrepancy looks weird and makes
precheck on pfn validity tricky. So let's align them.
Signed-off-by: Naoya Horiguchi
---
drivers/base/memory.c | 2 +-
include/linux/mm.h| 2 +-
mm/madvise.c | 2 +-
mm/memory-failure.c | 8
4 files changed, 7 insertions(+), 7 deletions(-)
diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index e5485c22ef77..04e469c82852 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -540,7 +540,7 @@ static ssize_t soft_offline_page_store(struct device *dev,
pfn >>= PAGE_SHIFT;
if (!pfn_valid(pfn))
return -ENXIO;
- ret = soft_offline_page(pfn_to_page(pfn));
+ ret = soft_offline_page(pfn);
return ret == 0 ? count : ret;
}
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 3eba26324ff1..0a452020edf5 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2783,7 +2783,7 @@ extern int sysctl_memory_failure_early_kill;
extern int sysctl_memory_failure_recovery;
extern void shake_page(struct page *p, int access);
extern atomic_long_t num_poisoned_pages __read_mostly;
-extern int soft_offline_page(struct page *page);
+extern int soft_offline_page(unsigned long pfn);
/*
diff --git a/mm/madvise.c b/mm/madvise.c
index fd221b610b52..df198d1e5e2e 100644
--- a/mm/madvise.c
+++ b/mm/madvise.c
@@ -893,7 +893,7 @@ static int madvise_inject_error(int behavior,
if (behavior == MADV_SOFT_OFFLINE) {
pr_info("Soft offlining pfn %#lx at process virtual address
%#lx\n",
pfn, start);
- ret = soft_offline_page(page);
+ ret = soft_offline_page(pfn);
if (ret)
return ret;
} else {
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 4f16e0a7e7cc..eb4fd5e8d5e1 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1514,7 +1514,7 @@ static void memory_failure_work_func(struct work_struct
*work)
if (!gotten)
break;
if (entry.flags & MF_SOFT_OFFLINE)
- soft_offline_page(pfn_to_page(entry.pfn));
+ soft_offline_page(entry.pfn);
else
memory_failure(entry.pfn, entry.flags);
}
@@ -1822,7 +1822,7 @@ static int soft_offline_free_page(struct page *page)
/**
* soft_offline_page - Soft offline a page.
- * @page: page to offline
+ * @pfn: pfn to soft-offline
*
* Returns 0 on success, otherwise negated errno.
*
@@ -1841,10 +1841,10 @@ static int soft_offline_free_page(struct page *page)
* This is not a 100% solution for all memory, but tries to be
* ``good enough'' for the majority of memory.
*/
-int soft_offline_page(struct page *page)
+int soft_offline_page(unsigned long pfn)
{
int ret;
- unsigned long pfn = page_to_pfn(page);
+ struct page *page = pfn_to_page(pfn);
if (is_zone_device_page(page)) {
pr_debug_ratelimited("soft_offline: %#lx page is device page\n",
I think you should rebase that patch on linux-next (where the
pfn_to_online_page() check is in place). I assume you'll want to move
the pfn_to_online_page() check into soft_offline_page() then as well?
--
Thanks,
David / dhildenb
[PATCH] mm, soft-offline: convert parameter to pfn
Hi,
I wrote a simple cleanup for parameter of soft_offline_page(),
based on thread https://lkml.org/lkml/2019/10/11/57.
I know that we need more cleanup on hwpoison-inject, but I think
that will be mentioned in re-write patchset Oscar is preparing now.
So let me shared only this part as a separate one now.
Thanks,
Naoya Horiguchi
---
From: Naoya Horiguchi
Date: Wed, 16 Oct 2019 15:49:00 +0900
Subject: [PATCH] mm, soft-offline: convert parameter to pfn
Currently soft_offline_page() receives struct page, and its sibling
memory_failure() receives pfn. This discrepancy looks weird and makes
precheck on pfn validity tricky. So let's align them.
Signed-off-by: Naoya Horiguchi
---
drivers/base/memory.c | 2 +-
include/linux/mm.h| 2 +-
mm/madvise.c | 2 +-
mm/memory-failure.c | 8
4 files changed, 7 insertions(+), 7 deletions(-)
diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index e5485c22ef77..04e469c82852 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -540,7 +540,7 @@ static ssize_t soft_offline_page_store(struct device *dev,
pfn >>= PAGE_SHIFT;
if (!pfn_valid(pfn))
return -ENXIO;
- ret = soft_offline_page(pfn_to_page(pfn));
+ ret = soft_offline_page(pfn);
return ret == 0 ? count : ret;
}
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 3eba26324ff1..0a452020edf5 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2783,7 +2783,7 @@ extern int sysctl_memory_failure_early_kill;
extern int sysctl_memory_failure_recovery;
extern void shake_page(struct page *p, int access);
extern atomic_long_t num_poisoned_pages __read_mostly;
-extern int soft_offline_page(struct page *page);
+extern int soft_offline_page(unsigned long pfn);
/*
diff --git a/mm/madvise.c b/mm/madvise.c
index fd221b610b52..df198d1e5e2e 100644
--- a/mm/madvise.c
+++ b/mm/madvise.c
@@ -893,7 +893,7 @@ static int madvise_inject_error(int behavior,
if (behavior == MADV_SOFT_OFFLINE) {
pr_info("Soft offlining pfn %#lx at process virtual
address %#lx\n",
pfn, start);
- ret = soft_offline_page(page);
+ ret = soft_offline_page(pfn);
if (ret)
return ret;
} else {
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 4f16e0a7e7cc..eb4fd5e8d5e1 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1514,7 +1514,7 @@ static void memory_failure_work_func(struct work_struct
*work)
if (!gotten)
break;
if (entry.flags & MF_SOFT_OFFLINE)
- soft_offline_page(pfn_to_page(entry.pfn));
+ soft_offline_page(entry.pfn);
else
memory_failure(entry.pfn, entry.flags);
}
@@ -1822,7 +1822,7 @@ static int soft_offline_free_page(struct page *page)
/**
* soft_offline_page - Soft offline a page.
- * @page: page to offline
+ * @pfn: pfn to soft-offline
*
* Returns 0 on success, otherwise negated errno.
*
@@ -1841,10 +1841,10 @@ static int soft_offline_free_page(struct page *page)
* This is not a 100% solution for all memory, but tries to be
* ``good enough'' for the majority of memory.
*/
-int soft_offline_page(struct page *page)
+int soft_offline_page(unsigned long pfn)
{
int ret;
- unsigned long pfn = page_to_pfn(page);
+ struct page *page = pfn_to_page(pfn);
if (is_zone_device_page(page)) {
pr_debug_ratelimited("soft_offline: %#lx page is device page\n",
--
2.17.1
