Commit 0af83abb authored Aug 06, 2019 by Liu Song Committed by Richard Weinberger Aug 22, 2019

ubifs: Limit the number of pages in shrink_liability



If the number of dirty pages to be written back is large,
then writeback_inodes_sb will block waiting for a long time,
causing hung task detection alarm. Therefore, we should limit
the maximum number of pages written back this time, which let
the budget be completed faster. The remaining dirty pages
tend to rely on the writeback mechanism to complete the
synchronization.

Fixes: b6e51316 ("writeback: separate starting of sync vs opportunistic writeback")
Signed-off-by: Liu Song <liu.song11@zte.com.cn>
Signed-off-by: Richard Weinberger <richard@nod.at>

parent 377e208f

fs/ubifs/budget.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -51,7 +51,7 @@
		static void shrink_liability(struct ubifs_info *c, int nr_to_write)
		{
		down_read(&c->vfs_sb->s_umount);
		writeback_inodes_sb(c->vfs_sb, WB_REASON_FS_FREE_SPACE);
		writeback_inodes_sb_nr(c->vfs_sb, nr_to_write, WB_REASON_FS_FREE_SPACE);
		up_read(&c->vfs_sb->s_umount);
		}

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