The patch titled
Subject: kexec: update VMCOREINFO for compound_order/dtor
has been added to the -mm tree. Its filename is
kexec-update-vmcoreinfo-for-compound_order-dtor.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/kexec-update-vmcoreinfo-for-compound_order-dtor.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/kexec-update-vmcoreinfo-for-compound_order-dtor.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Atsushi Kumagai <ats-kumagai@xxxxxxxxxxxxx>
Subject: kexec: update VMCOREINFO for compound_order/dtor
makedumpfile refers page.lru.next to get the order of compound pages for
page filtering. However, now the order is stored in page.compound_order,
hence VMCOREINFO should be updated to export the offset of
page.compound_order.
The fact is, page.compound_order was introduced already in kernel 4.0, but
the offset of it was the same as page.lru.next until kernel 4.3, so this
was not actual problem.
The above can be said also for page.lru.prev and page.compound_dtor, it's
necessary to detect hugetlbfs pages. Further, the content was changed
from direct address to the ID which means dtor.
Signed-off-by: Atsushi Kumagai <ats-kumagai@xxxxxxxxxxxxx>
Acked-by: Dave Young <dyoung@xxxxxxxxxx>
Cc: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>
Cc: Vivek Goyal <vgoyal@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/kexec_core.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff -puN kernel/kexec_core.c~kexec-update-vmcoreinfo-for-compound_order-dtor kernel/kexec_core.c
--- a/kernel/kexec_core.c~kexec-update-vmcoreinfo-for-compound_order-dtor
+++ a/kernel/kexec_core.c
@@ -1415,6 +1415,8 @@ static int __init crash_save_vmcoreinfo_
VMCOREINFO_OFFSET(page, lru);
VMCOREINFO_OFFSET(page, _mapcount);
VMCOREINFO_OFFSET(page, private);
+ VMCOREINFO_OFFSET(page, compound_dtor);
+ VMCOREINFO_OFFSET(page, compound_order);
VMCOREINFO_OFFSET(pglist_data, node_zones);
VMCOREINFO_OFFSET(pglist_data, nr_zones);
#ifdef CONFIG_FLAT_NODE_MEM_MAP
@@ -1447,8 +1449,8 @@ static int __init crash_save_vmcoreinfo_
#ifdef CONFIG_X86
VMCOREINFO_NUMBER(KERNEL_IMAGE_SIZE);
#endif
-#ifdef CONFIG_HUGETLBFS
- VMCOREINFO_SYMBOL(free_huge_page);
+#ifdef CONFIG_HUGETLB_PAGE
+ VMCOREINFO_NUMBER(HUGETLB_PAGE_DTOR);
#endif
arch_crash_save_vmcoreinfo();
_
Patches currently in -mm which might be from ats-kumagai@xxxxxxxxxxxxx are
kexec-update-vmcoreinfo-for-compound_order-dtor.patch
kexec-export-offsetpagecompound_head-to-find-out-compound-tail-page.patch
--
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
