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kexec: allow kdump with crash_kexec_post_notifiers

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If a crash kernel is loaded, do not crash the running domain.  This is
needed if the kernel is loaded with crash_kexec_post_notifiers, because
panic notifiers are run before __crash_kexec() in that case, and this
Xen hook prevents its being called later.

[akpm@linux-foundation.org: build fix: unconditionally include kexec.h]
Link: http://lkml.kernel.org/r/20160713122000.14969.99963.stgit@hananiah.suse.cz
Signed-off-by: Petr Tesarik <ptesarik@suse.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Josh Triplett <josh@joshtriplett.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: David Vrabel <david.vrabel@citrix.com>
Cc: Vivek Goyal <vgoyal@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 2016-08-02 14:06:19 -07:00 committed by Linus Torvalds
parent 21db79e8bb
commit c025311596
1 changed files with 2 additions and 3 deletions
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5
arch/x86/xen/enlighten.c
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@ -34,9 +34,7 @@
#include <linux/edd.h>
#include <linux/frame.h>
#ifdef CONFIG_KEXEC_CORE
#include <linux/kexec.h>
#endif
#include <xen/xen.h>
#include <xen/events.h>
@ -1334,7 +1332,8 @@ static void xen_crash_shutdown(struct pt_regs *regs)
static int
xen_panic_event(struct notifier_block *this, unsigned long event, void *ptr)
{
xen_reboot(SHUTDOWN_crash);
if (!kexec_crash_loaded())
xen_reboot(SHUTDOWN_crash);
return NOTIFY_DONE;
}