Re: [RFC PATCH 1/2] mm: introduce MAP_FIXED_SAFE
flat view
From: Florian Weimer <hidden>
Date: 2017-11-17 07:31:07
Also in:
linux-arch, linux-mm, lkml
On 11/16/2017 11:18 AM, Michal Hocko wrote:
quoted hunk ↗ jump to hunk
+ if (flags & MAP_FIXED_SAFE) { + struct vm_area_struct *vma = find_vma(mm, addr); + + if (vma && vma->vm_start <= addr) + return -ENOMEM; + }
Could you pick a different error code which cannot also be caused by a an unrelated, possibly temporary condition? Maybe EBUSY or EEXIST? This would definitely help with application-based randomization of mappings, and there, actual ENOMEM and this error would have to be handled differently. Thanks, Florian