On Thu 25-07-13 18:25:33, Johannes Weiner wrote:
> Back before smart OOM killing, when faulting tasks where killed
> directly on allocation failures, the arch-specific fault handlers
> needed special protection for the init process.
>
> Now that all fault handlers call into the generic OOM killer (609838c
> "mm: invoke oom-killer from remaining unconverted page fault
> handlers"), which already provides init protection, the arch-specific
> leftovers can be removed.
>
> Signed-off-by: Johannes Weiner <han...@cmpxchg.org>
Looks good to me
Reviewed-by: Michal Hocko <mho...@suse.cz>
> ---
> arch/arc/mm/fault.c | 5 -----
> arch/score/mm/fault.c | 6 ------
> arch/tile/mm/fault.c | 6 ------
> 3 files changed, 17 deletions(-)
>
> diff --git a/arch/arc/mm/fault.c b/arch/arc/mm/fault.c
> index 0fd1f0d..6b0bb41 100644
> --- a/arch/arc/mm/fault.c
> +++ b/arch/arc/mm/fault.c
> @@ -122,7 +122,6 @@ good_area:
> goto bad_area;
> }
>
> -survive:
> /*
> * If for any reason at all we couldn't handle the fault,
> * make sure we exit gracefully rather than endlessly redo
> @@ -201,10 +200,6 @@ no_context:
> die("Oops", regs, address);
>
> out_of_memory:
> - if (is_global_init(tsk)) {
> - yield();
> - goto survive;
> - }
> up_read(&mm->mmap_sem);
>
> if (user_mode(regs)) {
> diff --git a/arch/score/mm/fault.c b/arch/score/mm/fault.c
> index 6b18fb0..4b71a62 100644
> --- a/arch/score/mm/fault.c
> +++ b/arch/score/mm/fault.c
> @@ -100,7 +100,6 @@ good_area:
> goto bad_area;
> }
>
> -survive:
> /*
> * If for any reason at all we couldn't handle the fault,
> * make sure we exit gracefully rather than endlessly redo
> @@ -167,11 +166,6 @@ no_context:
> */
> out_of_memory:
> up_read(&mm->mmap_sem);
> - if (is_global_init(tsk)) {
> - yield();
> - down_read(&mm->mmap_sem);
> - goto survive;
> - }
> if (!user_mode(regs))
> goto no_context;
> pagefault_out_of_memory();
> diff --git a/arch/tile/mm/fault.c b/arch/tile/mm/fault.c
> index f7f99f9..ac553ee 100644
> --- a/arch/tile/mm/fault.c
> +++ b/arch/tile/mm/fault.c
> @@ -430,7 +430,6 @@ good_area:
> goto bad_area;
> }
>
> - survive:
> /*
> * If for any reason at all we couldn't handle the fault,
> * make sure we exit gracefully rather than endlessly redo
> @@ -568,11 +567,6 @@ no_context:
> */
> out_of_memory:
> up_read(&mm->mmap_sem);
> - if (is_global_init(tsk)) {
> - yield();
> - down_read(&mm->mmap_sem);
> - goto survive;
> - }
> if (is_kernel_mode)
> goto no_context;
> pagefault_out_of_memory();
> --
> 1.8.3.2
>
--
Michal Hocko
SUSE Labs
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