Messages in this thread | | | From | Alex Ghiti <> | Subject | Re: [PATCH RESEND 1/8] s390: Start fallback of top-down mmap at mm->mmap_base | Date | Wed, 19 Jun 2019 01:54:20 -0400 |
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Really sorry about that, my connection is weird this morning, I'll retry tomorrow.
Sorry again,
Alex
On 6/19/19 1:42 AM, Alexandre Ghiti wrote: > In case of mmap failure in top-down mode, there is no need to go through > the whole address space again for the bottom-up fallback: the goal of this > fallback is to find, as a last resort, space between the top-down mmap base > and the stack, which is the only place not covered by the top-down mmap. > > Signed-off-by: Alexandre Ghiti <alex@ghiti.fr> > --- > arch/s390/mm/mmap.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/arch/s390/mm/mmap.c b/arch/s390/mm/mmap.c > index cbc718ba6d78..4a222969843b 100644 > --- a/arch/s390/mm/mmap.c > +++ b/arch/s390/mm/mmap.c > @@ -166,7 +166,7 @@ arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0, > if (addr & ~PAGE_MASK) { > VM_BUG_ON(addr != -ENOMEM); > info.flags = 0; > - info.low_limit = TASK_UNMAPPED_BASE; > + info.low_limit = mm->mmap_base; > info.high_limit = TASK_SIZE; > addr = vm_unmapped_area(&info); > if (addr & ~PAGE_MASK)
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