Re: [PATCH v1] mm/madvise: pass return code of memory_failure() to userspace

[Andrew Morton]

On Fri, 22 Jan 2016 17:27:57 +0900 Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx> wrote:

> Currently the return value of memory_failure() is not passed to userspace, which
> is inconvenient for test programs that want to know the result of error handling.
> So let's return it to the caller as we already do in MADV_SOFT_OFFLINE case.

I updated this to mention that it's for madvise(MADV_HWPOISON):

: Currently the return value of memory_failure() is not passed to userspace
: when madvise(MADV_HWPOISON) is used.  This is inconvenient for test
: programs that want to know the result of error handling.  So let's return
: it to the caller as we already do in the MADV_SOFT_OFFLINE case.

btw, MADV_SOFT_OFFLINE and MADV_HWPOISON are not documented in that
comment block over sys_madvise().  Fixy please?  You might want to
check that no other MADV_foo values have been omitted.