Re: [RFC PATCH 0/3] Obey mark_page_accessed hint given by filesystems
From: Mel Gorman <mgorman@suse.de>
Date: 2013-05-01 08:08:19
Also in:
linux-fsdevel, linux-mm, lkml
On Wed, May 01, 2013 at 02:28:17PM +0800, Will Huck wrote:
Hi Mel, On 04/30/2013 12:31 AM, Mel Gorman wrote:quoted
Andrew Perepechko reported a problem whereby pages are being prematurely evicted as the mark_page_accessed() hint is ignored for pages that are currently on a pagevec -- http://www.spinics.net/lists/linux-ext4/msg37340.html . Alexey Lyahkov and Robin Dong have also reported problems recently that could be due to hot pages reaching the end of the inactive list too quickly and be reclaimed.Both shrink_active_list and shrink_inactive_list can call lru_add_drain(), why the hot pages can't be mark Actived during this time?
Because by then it's not known that the filesystem had called mark_page_accessed() to indicate the page should be activated. -- Mel Gorman SUSE Labs -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>