Messages in this thread Patch in this message | | | Date | Sat, 20 Jun 2015 01:19:15 +0200 | From | Oleg Nesterov <> | Subject | [PATCH 2/4] mremap: don't do mm_populate(new_addr) on failure |
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move_vma() sets *locked even if move_page_tables() or ->mremap() fails, change sys_mremap() to check "ret & ~PAGE_MASK".
I think we should simply remove the VM_LOCKED code in move_vma(), that is why this patch doesn't change move_vma(). But this needs more cleanups.
Signed-off-by: Oleg Nesterov <oleg@redhat.com> --- mm/mremap.c | 4 +++- 1 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/mm/mremap.c b/mm/mremap.c index a6306bc..492721c 100644 --- a/mm/mremap.c +++ b/mm/mremap.c @@ -574,8 +574,10 @@ SYSCALL_DEFINE5(mremap, unsigned long, addr, unsigned long, old_len, ret = move_vma(vma, addr, old_len, new_len, new_addr, &locked); } out: - if (ret & ~PAGE_MASK) + if (ret & ~PAGE_MASK) { vm_unacct_memory(charged); + locked = 0; + } up_write(¤t->mm->mmap_sem); if (locked && new_len > old_len) mm_populate(new_addr + old_len, new_len - old_len); -- 1.5.5.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in Please read the FAQ at http://www.tux.org/lkml/
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