Messages in this thread | | | Date | Sat, 22 Oct 2011 14:59:26 +0800 | From | Wu Fengguang <> | Subject | Re: [PATCH 0/7] writeback: avoid touching dirtied_when on blocked inodes |
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> In general it looks better we first root case the "decreasing wrote > pages by writeback_single_inode() over time" problem before looking > into further steps..
The problem shows up in many of the regression cases. For example, the thresh=1G/ext4-100dd case with patches 1-4 applied will not only see nr_writeback occasionally dropped low (bdi_dirty_state-8:0.png), but also see repeated pattern of nr_wrote by writeback_single_inode() slowly decreasing to 0 during some period of dozens of seconds (writeback_single_inode.png).
Thanks, Fengguang [unhandled content-type:image/png][unhandled content-type:image/png][unhandled content-type:image/png][unhandled content-type:image/png] | |