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Gentoo's Bugzilla – Attachment 328986 Details for
Bug 421853
With 16GB RAM all Kernel versions >= 3.3 and < 3.5rc1 show performance loss, exceeding a factor of 10, when writing large (2G) files compared to 3.2.16
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9ab6de8_partial_undo.patch
file_421853.txt (text/plain), 966 bytes, created by
Tom Wijsman (TomWij) (RETIRED)
on 2012-11-08 18:51:11 UTC
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Description:
9ab6de8_partial_undo.patch
Filename:
MIME Type:
Creator:
Tom Wijsman (TomWij) (RETIRED)
Created:
2012-11-08 18:51:11 UTC
Size:
966 bytes
patch
obsolete
>diff --git a/mm/page-writeback.c b/mm/page-writeback.c >index 9ab6de8..c081bf6 100644 >--- a/mm/page-writeback.c >+++ b/mm/page-writeback.c >@@ -157,7 +157,7 @@ static unsigned long highmem_dirtyable_memory(unsigned long total) > &NODE_DATA(node)->node_zones[ZONE_HIGHMEM]; > > x += zone_page_state(z, NR_FREE_PAGES) + >- zone_reclaimable_pages(z) - z->dirty_balance_reserve; >+ zone_reclaimable_pages(z); > } > /* > * Make sure that the number of highmem pages is never larger >@@ -181,8 +181,7 @@ static unsigned long determine_dirtyable_memory(void) > { > unsigned long x; > >- x = global_page_state(NR_FREE_PAGES) + global_reclaimable_pages() - >- dirty_balance_reserve; >+ x = global_page_state(NR_FREE_PAGES) + global_reclaimable_pages(); > > if (!vm_highmem_is_dirtyable) > x -= highmem_dirtyable_memory(x);
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bug 421853
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