remove cast for kzalloc return value.
Signed-off-by: Zhang Yanfei
Cc: Greg Kroah-Hartman
Cc: Jiri Slaby
Cc: Andrew Morton
Cc: linux-ser...@vger.kernel.org
---
drivers/tty/serial/icom.c |3 +--
1 files changed, 1 insertions(+), 2 deletions(-)
diff --git a/drivers/tty/serial/icom.c b
remove cast for kmalloc return value.
Signed-off-by: Zhang Yanfei
Cc: Greg Kroah-Hartman
Cc: Jiri Slaby
Cc: Andrew Morton
---
drivers/tty/vt/consolemap.c |3 +--
1 files changed, 1 insertions(+), 2 deletions(-)
diff --git a/drivers/tty/vt/consolemap.c b/drivers/tty/vt/consolemap.c
index
remove cast for kmalloc return value.
Signed-off-by: Zhang Yanfei
Cc: Matthew Dharm
Cc: Greg Kroah-Hartman
Cc: Andrew Morton
Cc: linux-...@vger.kernel.org
Cc: usb-stor...@lists.one-eyed-alien.net
---
drivers/usb/storage/isd200.c |3 +--
1 files changed, 1 insertions(+), 2 deletions
remove cast for kmalloc return value.
Signed-off-by: Zhang Yanfei
Cc: Andrew Morton
---
fs/befs/btree.c |3 +--
1 files changed, 1 insertions(+), 2 deletions(-)
diff --git a/fs/befs/btree.c b/fs/befs/btree.c
index a66c9b1..74e397d 100644
--- a/fs/befs/btree.c
+++ b/fs/befs/btree.c
remove cast for kmalloc return value.
Signed-off-by: Zhang Yanfei
Cc: Evgeniy Dushistov
Cc: Andrew Morton
---
fs/ufs/util.c |3 +--
1 files changed, 1 insertions(+), 2 deletions(-)
diff --git a/fs/ufs/util.c b/fs/ufs/util.c
index 95425b5..b6c2f94 100644
--- a/fs/ufs/util.c
+++ b/fs/ufs
remove cast for kmalloc/kzalloc return value.
Signed-off-by: Zhang Yanfei
Cc: Vlad Yasevich
Cc: Sridhar Samudrala
Cc: Neil Horman
Cc: Andrew Morton
Cc: linux-s...@vger.kernel.org
---
include/net/sctp/sctp.h |2 +-
net/sctp/protocol.c |2 +-
2 files changed, 2 insertions(+), 2
Remove the WARN_ON_ONCE(!mm) check as the comment suggested.
Kernel code calls find_vma only when it is absolutely sure that the
mm_struct arg to it is non-NULL.
Signed-off-by: Zhang Yanfei
Cc: Andrew Morton
---
mm/mmap.c |3 ---
1 files changed, 0 insertions(+), 3 deletions(-)
diff --git
+reclaimable+file function for
> NORMAL zone.
>
>> Redarding this patch:
>> net-change-type-of-netns_ipvs-sysctl_sync_qlen_max.patch and
>> net-fix-functions-and-variables-related-to-netns_ipvs-sysctl_sync_qlen_max.patch
>> are joined at the hip and should be redone as a single patc
From: Zhang Yanfei
This member of struct netns_ipvs is calculated from nr_free_buffer_pages
so change its type to unsigned long in case of overflow. Also, type of
its related proc var sync_qlen_max and the return type of function
sysctl_sync_qlen_max() should be changed to unsigned long, too
>>>> + *the active list, shrinking the inactive list by one slot. This
>>>> + *also slides all inactive pages that were faulted into the cache
>>>> + *more recently than the activated page towards the tail of the
>>>> + *inactive lis
Add an Documentation/ABI entry for /sys/devices/system/cpu/cpu0/crash_notes
and /sys/devices/system/cpu/cpu0/crash_notes_size.
Cc: Greg KH
Cc: "Eric W. Biederman"
Cc: Vivek Goyal
Signed-off-by: Zhang Yanfei
---
Documentation/ABI/testing/sysfs-devices-system-cpu | 12 +++
parse it intead of using 1024.
The idea came from Vivek Goyal. And a later patch will be sent to
kexec-tools to let it parse the size.
Cc: Greg KH
Cc: "Eric W. Biederman"
Cc: Vivek Goyal
Signed-off-by: Zhang Yanfei
---
drivers/base/cpu.c | 14 ++
1 files changed, 14
Hi, simon
I forgot to add your email in the CC, could you please help
reviewing this patch since I will send the kexec-tools patch
if this patch is accepted.
Thanks
Zhang
于 2013年03月28日 16:15, Zhang Yanfei 写道:
> For percpu notes, we are exporting only address and not size. So
> the use
From: Zhang Yanfei
In function cache_alloc_refill, we have used BUG_ON to ensure
that slabp->inuse is less than cachep->num before the while
test. And in the while body, we do not change the value of
slabp->inuse and cachep->num, so it is not necessary to test
if slabp->inuse <
Sorry for making noise. I've made a mistake and please ignore this patch.
On 07/02/2013 12:29 AM, Zhang Yanfei wrote:
> From: Zhang Yanfei
>
> In function cache_alloc_refill, we have used BUG_ON to ensure
> that slabp->inuse is less than cachep->num before the while
> t
From: Zhang Yanfei
After commit 8170e6b ("x86, 64bit: Use a #PF handler to materialize
early mappings on demand"), we don't define level3_ident_pgt and
level2_ident_pgt if !CONFIG_XEN. So move the two variables' declaration
into CONFIG_XEN.
Signed-off-by: Zhang Yanfei
---
arch/x
N - 1)) &\
> - ~(CONFIG_PHYSICAL_ALIGN - 1))
> -
> -#define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START)
> #define __START_KERNEL_map _AC(0x8000, UL)
>
> /* See Documentation/x86/x86_64/mm.
wn
> come from?
I guess, it might be: for one page allocation at once, comparing to the original
code, this patch adds two parameters nr_pages and pages and will do extra checks
for the parameter nr_pages in the allocation path.
>
> [...]
--
Thanks.
Zhang Yanfei
--
To unsubscribe from this
On 07/03/2013 11:51 PM, Zhang Yanfei wrote:
> On 07/03/2013 11:28 PM, Michal Hocko wrote:
>> On Wed 03-07-13 17:34:15, Joonsoo Kim wrote:
>> [...]
>>> For one page allocation at once, this patchset makes allocator slower than
>>> before (-5%).
>>
>&g
d.
>
> This patch saves the user defined value and allows updating
> min_free_kbytes only if it is higher than the saved one.
>
> A warning is printed when the new value is ignored.
Looks reasonable.
Acked-by: Zhang Yanfei
>
> Signed-off-by: Michal Hocko
> ---
> mm/
> it's simpler to just rely on the check done in isolate_freepages() without
> lock, and not pretend that the recheck under lock guarantees anything. It is
> just a heuristic after all.
>
> Signed-off-by: Vlastimil Babka
Reviewed-by: Zhang Yanfei
> Cc: Minchan Kim
> Cc: Mel Go
per migrate
> page, to 2.25 free pages per migrate page, without affecting success rates.
>
> Signed-off-by: Vlastimil Babka
Reviewed-by: Zhang Yanfei
> Cc: Minchan Kim
> Cc: Mel Gorman
> Cc: Joonsoo Kim
> Cc: Michal Nazarewicz
> Cc: Naoya Horiguchi
>
dd the
detailed function description to make it clear only.
Reviewed-by: Zhang Yanfei
>
> Acked-by: Minchan Kim
>
--
Thanks.
Zhang Yanfei
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the body of a message to majord...@vger.kernel.org
More ma
mutex_lock(>lock);
>> -bitmap_clear(cma->bitmap, pfn - cma->base_pfn, count);
>> -mutex_unlock(>lock);
>> -}
>> -
>> /**
>> * dma_alloc_from_contiguous() - allocate pages from contiguous area
>> * @dev: Pointer to device for
me consistently.
>
> Lastly, I add one more debug log on cma_activate_area().
>
> Signed-off-by: Joonsoo Kim
Reviewed-by: Zhang Yanfei
>
> diff --git a/drivers/base/dma-contiguous.c b/drivers/base/dma-contiguous.c
> index 83969f8..bd0bb81 100644
> --- a/drivers/base/dm
aningful error message like what was successful zone and what is
>> new zone and failed pfn number?
>
> What I want to do in early phase of this patchset is to make cma code
> on DMA APIs similar to ppc kvm's cma code. ppc kvm's cma code already
> has this error hand
trary bitmap granularity for following generalization.
>
> Signed-off-by: Joonsoo Kim
Acked-by: Zhang Yanfei
>
> diff --git a/drivers/base/dma-contiguous.c b/drivers/base/dma-contiguous.c
> index bc4c171..9bc9340 100644
> --- a/drivers/base/dma-contiguous.c
> +++ b/drivers/base/
l change in DMA APIs.
>
> v2: There is no big change from v1 in mm/cma.c. Mostly renaming.
>
> Acked-by: Michal Nazarewicz
> Signed-off-by: Joonsoo Kim
Acked-by: Zhang Yanfei
>
> diff --git a/drivers/base/Kconfig b/drivers/base/Kconfig
> index 00e13ce..4eac559 100644
>
On 06/12/2014 11:21 AM, Joonsoo Kim wrote:
> We can remove one call sites for clear_cma_bitmap() if we first
> call it before checking error number.
>
> Signed-off-by: Joonsoo Kim
Reviewed-by: Zhang Yanfei
>
> diff --git a/mm/cma.c b/mm/cma.c
> index 1e1b017..01a0713 10
--
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majord...@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.tux.org/lkml/
>
--
Thanks.
Zhan
On 04/03/2014 10:37 AM, Li Zhong wrote:
> On Thu, 2014-04-03 at 09:37 +0800, Zhang Yanfei wrote:
>> Add ccing
>>
>> On 04/02/2014 04:56 PM, Li Zhong wrote:
>>> I noticed the phys_index and end_phys_index under
>>> /sys/devices/system/memory/memoryXXX/ have
s/MADV_NODUMP/MADV_DONTDUMP/
Signed-off-by: Zhang Yanfei
---
include/uapi/asm-generic/mman-common.h |2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/include/uapi/asm-generic/mman-common.h
b/include/uapi/asm-generic/mman-common.h
index 4164529..ddc3b36 100644
__lru_cache_add(page);
> +}
> +EXPORT_SYMBOL(lru_cache_add_file);
>
> /**
> * lru_cache_add - add a page to a page list
> * @page: the page to be added to the LRU.
> + *
> + * Queue the page for addition to the LRU via pagevec. The decision on
> whether
> + *
On 04/21/2014 12:02 PM, Jianyu Zhan wrote:
> Hi, Yanfei,
>
> On Mon, Apr 21, 2014 at 9:00 AM, Zhang Yanfei
> wrote:
>> What should be exported?
>>
>> lru_cache_add()
>> lru_cache_add_anon()
>> lru_cache_add_file()
>>
>> It seems you onl
Please, move up_read() outside khugepaged_alloc_page().
>
I might be wrong. If we up_read in khugepaged_scan_pmd(), then if we round again
do the for loop to get the next vma and handle it. Does we do this without
holding
the mmap_sem in any mode?
And if the loop end, we have anoth
e,
> and DMA32 zones on both nodes were thus not considered for compaction.
>
> Signed-off-by: Vlastimil Babka
> Cc: Minchan Kim
> Cc: Mel Gorman
> Cc: Joonsoo Kim
> Cc: Michal Nazarewicz
> Cc: Naoya Horiguchi
> Cc: Christoph Lameter
> Cc: Rik van Riel
>
nc compaction.
>
> Signed-off-by: Vlastimil Babka
> Cc: Minchan Kim
> Cc: Mel Gorman
> Cc: Joonsoo Kim
> Cc: Michal Nazarewicz
> Cc: Naoya Horiguchi
> Cc: Christoph Lameter
> Cc: Rik van Riel
> Cc: David Rientjes
I think this is a good clean-up to make
;> - * need_resched() true during async
>> - * compaction
>> - */
>> +enum compact_contended contended; /* Signal need_sched() or lock
>> +
. The lock contention
> avoidance for async compaction is achieved by the periodical unlock by
> compact_unlock_should_abort() and by using trylock in
> compact_trylock_irqsave()
> and aborting when trylock fails. Sync compaction does not use trylock.
>
> Signed-off-by: Vlastimil Babk
> Cc: Rik van Riel
> Acked-by: David Rientjes
Reviewed-by: Zhang Yanfei
> ---
> mm/compaction.c | 53 +++--
> 1 file changed, 31 insertions(+), 22 deletions(-)
>
> diff --git a/mm/compaction.c b/mm/compaction.c
> index 40d
per migrate
> page, to 2.25 free pages per migrate page, without affecting success rates.
>
> Signed-off-by: Vlastimil Babka
> Acked-by: David Rientjes
> Cc: Minchan Kim
> Cc: Mel Gorman
> Cc: Joonsoo Kim
> Cc: Michal Nazarewicz
> Cc: Naoya Horiguchi
> Cc: Chri
d gracefully.
> + *
> + * ACCESS_ONCE is used so that if the caller assigns the result into a local
> + * variable and e.g. tests it for valid range before using, the compiler
> cannot
> + * decide to remove the variable and inline the page_private(page) multiple
> + * times, p
> Signed-off-by: David Rientjes
> Signed-off-by: Vlastimil Babka
> Cc: Minchan Kim
> Cc: Mel Gorman
> Cc: Joonsoo Kim
> Cc: Michal Nazarewicz
> Cc: Naoya Horiguchi
> Cc: Christoph Lameter
> Cc: Rik van Riel
Reviewed-by: Zhang Yanfei
> ---
> mm/compa
On 06/23/2014 05:52 PM, Vlastimil Babka wrote:
> On 06/23/2014 07:39 AM, Zhang Yanfei wrote:
>> Hello
>>
>> On 06/21/2014 01:45 AM, Kirill A. Shutemov wrote:
>>> On Fri, Jun 20, 2014 at 05:49:31PM +0200, Vlastimil Babka wrote:
>>>> When allocating huge
LATE_ABORT
> return COMPACT_PARTIAL with *contended = cc.contended ==
> COMPACT_CONTENDED_LOCK (1)
> COMPACTFAIL
> if (contended_compaction && gfp_mask & __GFP_NO_KSWAPD)
> no goto nopage because contended_compaction was false by (1)
>
> __alloc_pages_direct_reclaim
f
> the range.
This should be updated because the implementation has been changed.
It also remove the page from the swapcache if it is.
Thank you for your effort!
--
Thanks.
Zhang Yanfei
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the body of a mess
max: 37266.00
> min: 22108.00min: 34149.00
>
> In summary, MADV_FREE is about 2 time faster than MADV_DONTNEED.
>
> Cc: Michael Kerrisk
> Cc: Linux API
> Cc: Hugh Dickins
> Cc: Johannes Weiner
> Cc: KOSAKI Motohiro
> Cc: Mel Gorman
> Cc: J
c: Thomas Gleixner
> Cc: Ingo Molnar
> Cc: "H. Peter Anvin"
> Cc: x...@kernel.org
> Acked-by: Kirill A. Shutemov
> Signed-off-by: Minchan Kim
Acked-by: Zhang Yanfei
> ---
> arch/x86/include/asm/pgtable.h | 10 ++
> 1 file changed, 10 insertions(+)
&
-
> 7 files changed, 248 insertions(+), 1 deletions(-)
>
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majord...@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-in
emory-hotplug: sh: suitable memory should go to ZONE_MOVABLE
> memory-hotplug: powerpc: suitable memory should go to ZONE_MOVABLE
>
> arch/ia64/mm/init.c | 7 +++
> arch/powerpc/mm/mem.c | 6 ++
> arch/sh/mm/init.c | 13 -
> arch/x86/mm/init_32.c |
f it really makes sense to check the migratetype here. This
>> check
>> doesn't add any new information to the code and make false impression that
>> this
>> function can be called for other migratetypes than CMA or MOVABLE. Even if
>> so,
>> then invalidating bh_lrus unconditionally will make more sense, IMHO.
>
> I agree. I cannot understand why alloc_contig_range has an argument of
> migratetype.
> Can the alloc_contig_range is called for other migrate type than CMA/MOVABLE?
>
> What do you think about removing the argument of migratetype and
> checking migratetype (if (migratetype == MIGRATE_CMA || migratetype ==
> MIGRATE_MOVABLE))?
>
Remove the checking only. Because gigantic page allocation used for hugetlb is
using alloc_contig_range(.. MIGRATE_MOVABLE).
Thanks.
--
Thanks.
Zhang Yanfei
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Please read the FAQ at http://www.tux.org/lkml/
on.h |2 +
> mm/internal.h | 5 +
> mm/page_alloc.c| 223 +-
> mm/page_isolation.c| 292
> +++-
> 4 files changed, 368 insertions(+), 154 deletions(-)
>
--
Thanks.
Zhang Yanfei
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Please read the FAQ at http://www.tux.org/lkml/
page. This may make code more understandable.
>
> One more thing, I did in this patch, is that fixing freepage accounting.
> If we clear guard page and link it onto isolate buddy list, we should
> not increase freepage count.
>
> Acked-by: Vlastimil Babka
> Signed-off-by: Jo
pageset_set_high_and_batch(zone,
> - per_cpu_ptr(zone->pageset, cpu));
> + pageset_get_values(zone, , );
> + pageset_update(zone, high, batch);
> }
> out:
> mutex_unlock(_batch_hi
> +#endif
> +
> +#ifdef CONFIG_SLUB
> +#include
> +#endif
> +
> /*
> * State of the slab allocator.
> *
> diff --git a/mm/slab_common.c b/mm/slab_common.c
> index d319502..2088904 100644
> --- a/mm/slab_common.c
> +++ b/mm/slab_common.c
> @@ -30,6 +30,1
in
>> the body to majord...@kvack.org. For more info on Linux MM,
>> see: http://www.linux-mm.org/ .
>> Don't email: mailto:"d...@kvack.org;> em...@kvack.org
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body
Currently, kdump just makes all the logical processors leave VMX operation by
executing VMXOFF instruction, so any VMCSs active on the logical processors may
be corrupted. But, sometimes, we need the VMCSs to debug guest images contained
in the host vmcore. To prevent the corruption, we should
This patch provides an alternative way to clear vmcss related to guests
on all cpus when doing kdump.
Signed-off-by: zhangyanfei
---
arch/x86/include/asm/kexec.h |3 +++
arch/x86/kernel/crash.c | 23 +++
2 files changed, 26 insertions(+), 0 deletions(-)
diff
Signed-off-by: zhangyanfei
---
arch/x86/kvm/vmx.c |9 +
1 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 4ff0ab9..f6a16b2 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -41,6 +41,7 @@
#include
#include
This patch exports the variable clear_loaded_vmcs_enabled to userspace.
Signed-off-by: zhangyanfei
---
Documentation/sysctl/kernel.txt |8
kernel/sysctl.c | 10 ++
2 files changed, 18 insertions(+), 0 deletions(-)
diff --git
于 2012年12月05日 04:14, Eric W. Biederman 写道:
> Zhang Yanfei writes:
>
>> This patch provides a way to VMCLEAR VMCSs related to guests
>> on all cpus before executing the VMXOFF when doing kdump. This
>> is used to ensure the VMCSs in the vmcore updated and
>>
ove the sysctl and clear VMCSs unconditionally.
Zhang Yanfei (2):
x86/kexec: VMCLEAR VMCSs loaded on all cpus if necessary
KVM-INTEL: provide the vmclear function and a bitmap to support
VMCLEAR in kdump
arch/x86/include/asm/kexec.h |2 +
arch/x86/kernel/crash.c |
This patch provides a way to VMCLEAR VMCSs related to guests
on all cpus before executing the VMXOFF when doing kdump. This
is used to ensure the VMCSs in the vmcore updated and
non-corrupted.
Signed-off-by: Zhang Yanfei
---
arch/x86/include/asm/kexec.h |2 ++
arch/x86/kernel/crash.c
The vmclear function will be assigned to the callback function pointer
when loading kvm-intel module. And the bitmap indicates whether we
should do VMCLEAR operation in kdump. The bits in the bitmap are
set/unset according to different conditions.
Signed-off-by: Zhang Yanfei
---
arch/x86/kvm
ove unnecessary conditions in function
cpu_emergency_clear_loaded_vmcss as Marcelo suggested.
Changelog from v1 to v2:
1. remove the sysctl and clear VMCSs unconditionally.
Zhang Yanfei (2):
x86/kexec: VMCLEAR VMCSs loaded on all cpus if necessary
KVM-INTEL: provide the vmclear funct
From: Zhang Yanfei
This patch provides a way to VMCLEAR VMCSs related to guests
on all cpus before executing the VMXOFF when doing kdump. This
is used to ensure the VMCSs in the vmcore updated and
non-corrupted.
Signed-off-by: Zhang Yanfei
Acked-by: Eric W. Biederman
---
arch/x86/include/asm
From: Zhang Yanfei
The vmclear function will be assigned to the callback function pointer
when loading kvm-intel module. And the bitmap indicates whether we
should do VMCLEAR operation in kdump. The bits in the bitmap are
set/unset according to different conditions.
Signed-off-by: Zhang Yanfei
This removes the sparse warning:
arch/x86/kernel/crash.c:49:32: sparse: incompatible types in comparison
expression (different address spaces)
Reported-by: kbuild test robot
Signed-off-by: Zhang Yanfei
---
arch/x86/include/asm/kexec.h |4 +++-
arch/x86/kernel/crash.c |4 ++--
2
In function fill_elf_header, elf->e_ident[EI_OSABI] is always set
to ELF_OSABI, so remove the unused argument 'osabi'.
Signed-off-by: Zhang Yanfei
---
fs/binfmt_elf.c |6 +++---
1 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index fbd9
于 2012年12月11日 04:30, Marcelo Tosatti 写道:
> On Fri, Dec 07, 2012 at 01:40:56PM +0800, Zhang Yanfei wrote:
>> This removes the sparse warning:
>> arch/x86/kernel/crash.c:49:32: sparse: incompatible types in comparison
>> expression (different address spaces)
>>
>&g
于 2012年12月11日 16:10, Gleb Natapov 写道:
> On Tue, Dec 11, 2012 at 04:04:55PM +0800, Zhang Yanfei wrote:
>> 于 2012年12月11日 04:30, Marcelo Tosatti 写道:
>>> On Fri, Dec 07, 2012 at 01:40:56PM +0800, Zhang Yanfei wrote:
>>>> This removes the sparse warning:
>>>
This removes the sparse warning:
arch/x86/kernel/crash.c:49:32: sparse: incompatible types in comparison
expression (different address spaces)
Reported-by: kbuild test robot
Signed-off-by: Zhang Yanfei
---
arch/x86/include/asm/kexec.h |3 ++-
arch/x86/kernel/crash.c |4 ++--
2
hole_end has been checked to make sure it is <= crash_res.end in the
while condition check, so the if condition check is duplicate.
Signed-off-by: Zhang Yanfei
---
kernel/kexec.c |2 --
1 files changed, 0 insertions(+), 2 deletions(-)
diff --git a/kernel/kexec.c b/kernel/kexec.c
in
This file was moved to arch/arm/mach-omap2/omap_hwmod.h by commit
2a296c8 (ARM: OMAP: Make plat/omap_hwmod.h local to mach-omap2).
Signed-off-by: Zhang Yanfei
---
MAINTAINERS |3 +--
1 files changed, 1 insertions(+), 2 deletions(-)
diff --git a/MAINTAINERS b/MAINTAINERS
index 915564e
Change MAINTAINED to Maintained.
Signed-off-by: Zhang Yanfei
---
MAINTAINERS |2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/MAINTAINERS b/MAINTAINERS
index c4f15a1..33d8f95 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -648,7 +648,7 @@ F: arch/arm/
ARM SUB
This file is now arch/x86/include/uapi/asm/bootparam.h.
Signed-off-by: Zhang Yanfei
---
Documentation/x86/zero-page.txt |2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/Documentation/x86/zero-page.txt b/Documentation/x86/zero-page.txt
index cf5437d..9723e2a 100644
于 2012年11月25日 22:26, Gleb Natapov 写道:
> On Thu, Nov 22, 2012 at 04:22:26PM +0800, Zhang Yanfei wrote:
>> Currently, kdump just makes all the logical processors leave VMX operation by
>> executing VMXOFF instruction, so any VMCSs active on the logical processors
>>
Hello Eric
Would you help review the patch, and give some comments, please ?
Thanks
Zhang
于 2012年11月22日 16:22, Zhang Yanfei 写道:
> Currently, kdump just makes all the logical processors leave VMX operation by
> executing VMXOFF instruction, so any VMCSs active on the logical processors
于 2012年11月27日 02:18, Eric W. Biederman 写道:
> Gleb Natapov writes:
>
>> On Mon, Nov 26, 2012 at 11:43:10AM -0600, Eric W. Biederman wrote:
>>> Gleb Natapov writes:
>>>
>>>> On Mon, Nov 26, 2012 at 09:08:54AM -0600, Eric W. Biederman wrote:
>>>&g
于 2012年11月27日 09:49, Eric W. Biederman 写道:
> Zhang Yanfei writes:
>
>> So in summary,
>>
>> 1. a specific callback function instead of a notifier?
>
> Yes.
>
>> 2. Instead of calling vmclear_local_loaded_vmcss, the vmclear operation
>>wil
ble vmclear_skipped to skip
vmclear in kdump in some conditions.
Changelog from v2 to v3:
1. remove unnecessary conditions in function
cpu_emergency_clear_loaded_vmcss as Marcelo suggested.
Changelog from v1 to v2:
1. remove the sysctl and clear VMCSs unconditionally.
Zhang Yanfei (2):
x86/ke
This patch provides a way to VMCLEAR VMCSs related to guests
on all cpus before executing the VMXOFF when doing kdump. This
is used to ensure the VMCSs in the vmcore updated and
non-corrupted.
Signed-off-by: Zhang Yanfei
---
arch/x86/include/asm/kexec.h |2 ++
arch/x86/kernel/crash.c
The vmclear function will be assigned to the callback function pointer
when loading kvm-intel module. And the bitmap indicates whether we
should do VMCLEAR operation in kdump. The bits in the bitmap are
set/unset according to different conditions.
Signed-off-by: Zhang Yanfei
---
arch/x86/kvm
于 2012年10月18日 18:55, Avi Kivity 写道:
> On 10/18/2012 03:12 AM, Zhang Yanfei wrote:
>> 于 2012年10月17日 18:16, Avi Kivity 写道:
>>> On 10/17/2012 04:28 AM, Zhang Yanfei wrote:
>>>> 于 2012年10月15日 23:43, Avi Kivity 写道:
>>>>> On 10/12/2012 08:40 AM, Zhang Yanfei
Currently, kdump just makes all the logical processors leave VMX operation by
executing VMXOFF instruction, so any VMCSs active on the logical processors may
be corrupted. But, sometimes, we need the VMCSs to debug guest images contained
in the host vmcore. To prevent the corruption, we should
This patch provides a way to VMCLEAR vmcss related to guests
on all cpus before executing the VMXOFF when doing kdump. This
is used to ensure the VMCSs in the vmcore updated and
non-corrupted.
Signed-off-by: zhangyanfei
---
arch/x86/include/asm/kexec.h |2 ++
arch/x86/kernel/crash.c |
Signed-off-by: zhangyanfei
---
arch/x86/kvm/vmx.c |9 +
1 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 4ff0ab9..f6a16b2 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -41,6 +41,7 @@
#include
#include
cpu_emergency_clear_loaded_vmcss as Marcelo suggested.
Changelog from v1 to v2:
1. remove the sysctl and clear VMCSs unconditionally.
Zhang Yanfei (2):
x86/kexec: VMCLEAR vmcss on all cpus if necessary
KVM-INTEL: add a notifier and a bitmap to support VMCLEAR in kdump
arch/x86/include/asm/kexec.h |2 +
arch/x86/kernel
This patch adds an atomic notifier list named crash_notifier_list.
When loading kvm-intel module, a notifier will be registered in
the list to enable vmcss loaded on all cpus to be VMCLEAR'd if
needed.
Signed-off-by: Zhang Yanfei
---
arch/x86/include/asm/kexec.h |2 ++
arch/x86/kernel
The notifier will be registered in crash_notifier_list when loading
kvm-intel module. And the bitmap indicates whether we should do
VMCLEAR operation in kdump. The bits in the bitmap are set/unset
according to different conditions.
Signed-off-by: Zhang Yanfei
---
arch/x86/kvm/vmx.c | 85
ctl and clear VMCSs unconditionally.
Zhang Yanfei (2):
x86/kexec: VMCLEAR vmcss on all cpus if necessary
KVM-INTEL: add a notifier and a bitmap to support VMCLEAR in kdump
arch/x86/include/asm/kexec.h |2 +
arch/x86/kernel/crash.c | 25 +
arch/x86/kvm/vmx.c |
This patch adds an atomic notifier list named vmclear_notifier_list.
When loading kvm-intel module, a notifier will be registered in
the list to enable vmcss loaded on all cpus to be VMCLEAR'd if
needed.
Signed-off-by: Zhang Yanfei
---
arch/x86/include/asm/kexec.h |2 ++
arch/x86/kernel
The notifier will be registered in vmclear_notifier_list when loading
kvm-intel module. And the bitmap indicates whether we should do
VMCLEAR operation in kdump. The bits in the bitmap are set/unset
according to different conditions.
Signed-off-by: Zhang Yanfei
---
arch/x86/kvm/vmx.c | 77
于 2012年10月15日 23:43, Avi Kivity 写道:
> On 10/12/2012 08:40 AM, Zhang Yanfei wrote:
>> Currently, kdump just makes all the logical processors leave VMX operation by
>> executing VMXOFF instruction, so any VMCSs active on the logical processors
>> may
>> be corrupt
于 2012年10月17日 18:16, Avi Kivity 写道:
> On 10/17/2012 04:28 AM, Zhang Yanfei wrote:
>> 于 2012年10月15日 23:43, Avi Kivity 写道:
>>> On 10/12/2012 08:40 AM, Zhang Yanfei wrote:
>>>> Currently, kdump just makes all the logical processors leave VMX operation
>>>>
This patch set exports offsets of VMCS fields as note information for
kdump. We call it VMCSINFO. The purpose of VMCSINFO is to retrieve
runtime state of guest machine image, such as registers, in host
machine's crash dump as VMCS format. The problem is that VMCS internal
is hidden by Intel in its
A new module named vmcsinfo-intel is used to fill VMCSINFO. And
this module depends on kvm-intel and kvm module. So we should
export some symbols of kvm-intel and kvm module that are needed
by vmcsinfo-intel.
Signed-off-by: zhangyanfei
---
arch/x86/include/asm/vmx.h | 73
fsets of VMCS fields for guest debugging.
+ *
+ * Copyright (C) 2012 Fujitsu, Inc.
+ *
+ * Authors:
+ * Zhang Yanfei
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2. See
+ * the COPYING file in the top-level directory.
+ *
+ */
+
+#include
+#include
+#include
+#include
+#
: Zhang Yanfei
+Description:
+ A collection of vmcs fields' offsets for Intel cpu.
+ Also including vmcs revision identifier.
+
+ Individual offsets are contained in subfiles named by
+ the filed's encoding, e.g.:
+
+ /sys/devices
Hello Avi,
Do you have any comments about this version of the patch set?
于 2012年07月12日 17:54, Zhang Yanfei 写道:
> This patch set exports offsets of VMCS fields as note information for
> kdump. We call it VMCSINFO. The purpose of VMCSINFO is to retrieve
> runtime state of guest mach
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