From 6d3ec14d703c660c4baf8d726538b5415e23b4fb Mon Sep 17 00:00:00 2001 From: Lukas Czerner Date: Tue, 4 Aug 2015 11:21:52 -0400 Subject: [PATCH] jbd2: limit number of reserved credits Currently there is no limitation on number of reserved credits we can ask for. If we ask for more reserved credits than 1/2 of maximum transaction size, or if total number of credits exceeds the maximum transaction size per operation (which is currently only possible with the former) we will spin forever in start_this_handle(). Fix this by adding this limitation at the start of start_this_handle(). This patch also removes the credit limitation 1/2 of maximum transaction size, since we really only want to limit the number of reserved credits. There is not much point to limit the credits if there is still space in the journal. This accidentally also fixes the online resize, where due to the limitation of the journal credits we're unable to grow file systems with 1k block size and size between 16M and 32M. It has been partially fixed by 2c869b262a10ca99cb866d04087d75311587a30c, but not entirely. Thanks Jan Kara for helping me getting the correct fix. Signed-off-by: Lukas Czerner Reviewed-by: Jan Kara Signed-off-by: Theodore Ts'o --- Reading git-format-patch failed