Re: [PATCH 2/2] mm: adds NOSIGBUS extension for out-of-band shmem read
From: Linus Torvalds <torvalds@linux-foundation.org>
Date: 2021-06-03 19:12:34
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linux-fsdevel, linux-mm, lkml
On Thu, Jun 3, 2021 at 12:07 PM Hugh Dickins [off-list ref] wrote:
But the point that we've arrived at, that I'm actually now fairly happy with, is do *not* permit MAP_NOSIGBUS on MAP_SHARED mappings.
Yeah, if that's sufficient, then that original patch should just work as-is.
But there was some reason why people didn't like that patch
originally, and I think it was literally about how it only worked on
private mappings (the "we don't have a flag for it in the vm_flags"
part was just a small detail.
I guess that objection ended up changing over time.
Linus