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kexec: export PG_swapbacked to VMCOREINFO 

Since commit 6326fec112 ("mm: Use owner_priv bit for PageSwapCache,
valid when PageSwapBacked"), PG_swapcache is an alias for
PG_owner_priv_1, which may be also used for other purposes.

To know whether the bit indeed has the PG_swapcache meaning, it is
necessary to check PG_swapbacked, hence this bit must be exported.

Link: http://lkml.kernel.org/r/20180410161345.142e142d@ezekiel.suse.cz
Signed-off-by: Petr Tesarik <ptesarik@suse.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Dave Young <dyoung@redhat.com>
Cc: Xunlei Pang <xlpang@redhat.com>
Cc: Baoquan He <bhe@redhat.com>
Cc: Hari Bathini <hbathini@linux.vnet.ibm.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: "Marc-Andr Lureau" <marcandre.lureau@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Petr Tesarik 2018-04-13 15:35:34 -07:00 committed by Linus Torvalds
parent 3f05317d98
commit 1cbf29da36
1 changed files with 1 additions and 0 deletions
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1
kernel/crash_core.c
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@ -454,6 +454,7 @@ static int __init crash_save_vmcoreinfo_init(void)
VMCOREINFO_NUMBER(PG_lru); VMCOREINFO_NUMBER(PG_lru);
VMCOREINFO_NUMBER(PG_private); VMCOREINFO_NUMBER(PG_private);
VMCOREINFO_NUMBER(PG_swapcache); VMCOREINFO_NUMBER(PG_swapcache);
VMCOREINFO_NUMBER(PG_swapbacked);
VMCOREINFO_NUMBER(PG_slab); VMCOREINFO_NUMBER(PG_slab);
#ifdef CONFIG_MEMORY_FAILURE #ifdef CONFIG_MEMORY_FAILURE
VMCOREINFO_NUMBER(PG_hwpoison); VMCOREINFO_NUMBER(PG_hwpoison);