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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2017-02-13 15:20:18 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2017-02-17 07:41:07 +0100 |
| commit | 549f2bf594782faa440055255831c9a51940a651 (patch) | |
| tree | 0af1543196a3d1f8a3b462397f453b1be798d903 /arch | |
| parent | s390: get rid of MACHINE_HAS_PFMF and MACHINE_HAS_HPAGE (diff) | |
| download | linux-549f2bf594782faa440055255831c9a51940a651.tar.xz linux-549f2bf594782faa440055255831c9a51940a651.zip | |
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: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/s390/mm/dump_pagetables.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/s390/mm/dump_pagetables.c b/arch/s390/mm/dump_pagetables.c index 145a0ccb5845..1b553d847140 100644 --- a/arch/s390/mm/dump_pagetables.c +++ b/arch/s390/mm/dump_pagetables.c @@ -1,5 +1,6 @@ #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; |