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Commit 549f2bf5 authored by Heiko Carstens's avatar Heiko Carstens Committed by Martin Schwidefsky
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s390/mm: add cond_resched call to kernel page table dumper 



Walking kernel page tables within the kernel page table dumper may
potentially take a lot of time. This may lead to soft lockup warning
messages.
To avoid this add a cond_resched call for each pgd_level iteration.

This is the same as "x86/mm/ptdump: Fix soft lockup in page table
walker" for x86.

Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 466178fc

arch/s390/mm/dump_pagetables.c

+2 −0
Original line number Diff line number Diff line 
#include <linux/seq_file.h>

#include <linux/debugfs.h>

#include <linux/sched.h>

#include <linux/mm.h>

#include <asm/sections.h>

#include <asm/pgtable.h>
@@ -187,6 +188,7 @@ static void walk_pgd_level(struct seq_file *m) 
		else

			note_page(m, &st, _PAGE_INVALID, 1);

		addr += PGDIR_SIZE;

		cond_resched();

	}

	/* Flush out the last page */

	st.current_address = max_addr;