Re: [RFC][PATCH] PM: Force GFP_NOIO during suspend/resume (was: Re: [linux-pm] Memory allocations in .suspend became very unreliable)

Oliver Neukum
2010-01-18T16:59:58Z

Am Sonntag, 17. Januar 2010 14:55:55 schrieb Rafael J. Wysocki:
> +void mm_force_noio_allocations(void)
> +{
> + /* Wait for all slowpath allocations using the old mask to complete */
> + down_write(&gfp_allowed_mask_sem);
> + saved_gfp_allowed_mask = gfp_allowed_mask;
> + gfp_allowed_mask &= ~(__GFP_IO | __GFP_FS);
> + up_write(&gfp_allowed_mask_sem);
> +}

In addition to this you probably want to exhaust all memory reserves
before you fail a memory allocation and forbid the OOM killer to run.

Regards
Oliver