On Thu, Feb 11, 2021 at 11:39:05AM -0800, Chris Goldsworthy wrote:
> On 2021-02-11 06:09, Matthew Wilcox wrote:
> > On Wed, Feb 10, 2021 at 09:35:40PM -0800, Chris Goldsworthy wrote:
> > > +/* These are used to control the BH LRU invalidation during page
> > > migration */
> > > +static struct cpum
On Wed, Feb 10, 2021 at 09:35:40PM -0800, Chris Goldsworthy wrote:
> Pages containing buffer_heads that are in one of the per-CPU
> buffer_head LRU caches will be pinned and thus cannot be migrated.
> This can prevent CMA allocations from succeeding, which are often used
> on platforms with co-proc
On 2021-02-11 06:09, Matthew Wilcox wrote:
On Wed, Feb 10, 2021 at 09:35:40PM -0800, Chris Goldsworthy wrote:
+/* These are used to control the BH LRU invalidation during page
migration */
+static struct cpumask lru_needs_invalidation;
+static bool bh_lru_disabled = false;
As I asked before,
On Wed, Feb 10, 2021 at 09:35:40PM -0800, Chris Goldsworthy wrote:
> +/* These are used to control the BH LRU invalidation during page migration */
> +static struct cpumask lru_needs_invalidation;
> +static bool bh_lru_disabled = false;
As I asked before, what protects this on an SMP system?
> @@
Pages containing buffer_heads that are in one of the per-CPU
buffer_head LRU caches will be pinned and thus cannot be migrated.
This can prevent CMA allocations from succeeding, which are often used
on platforms with co-processors (such as a DSP) that can only use
physically contiguous memory. It c
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