* vmscan.c: shrink_cache() doubt
@ 2001-12-29 8:18 alad
2001-12-29 8:41 ` Andrew Morton
0 siblings, 1 reply; 2+ messages in thread
From: alad @ 2001-12-29 8:18 UTC (permalink / raw)
To: linux-kernel
In shrink_cache(), we have
if (!page->buffers && (page_count(page) != 1 || !page->mapping))
goto page_mapped;
.
.
.
page_mapped:
if (--max_mapped >=0)
continue;
Assume page->buffers == NULL and page->count == 1, then why jump to page_mapped
if page->mapping == NULL ??
-- Amol
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: vmscan.c: shrink_cache() doubt
2001-12-29 8:18 vmscan.c: shrink_cache() doubt alad
@ 2001-12-29 8:41 ` Andrew Morton
0 siblings, 0 replies; 2+ messages in thread
From: Andrew Morton @ 2001-12-29 8:41 UTC (permalink / raw)
To: alad; +Cc: linux-kernel
alad@hss.hns.com wrote:
>
> In shrink_cache(), we have
>
> if (!page->buffers && (page_count(page) != 1 || !page->mapping))
> goto page_mapped;
> .
> .
> .
> page_mapped:
> if (--max_mapped >=0)
> continue;
>
> Assume page->buffers == NULL and page->count == 1, then why jump to page_mapped
> if page->mapping == NULL ??
>
These are anonymous pages - memory returned by malloc() rather
than by mmap().
Replace max_mapped with max_unfreeable and replace page_mapped
with page_unfreeable and it may make some sense.
-
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