Filesystems frozen with fsfreeze --freeze are not getting thawed with sysrq j (or echo j > /proc/sysrq-trigger). Thawing only deals with bdev part, does not do anything about fsfreeze.
I went for the easiest fix possible: just thaw the super block. Doing it requires a little bit of refactoring in order to keep the sb locked the whole time. The first patch moves sb iteration found in emergency remount to a dedicated func for code reuse. This patch patch is a no-op. The second employs factored out code to do both bdev and sb thaws. Mateusz Guzik (2): vfs: factor sb iteration out of do_emergency_remount buffer.c: call thaw_super during emergency thaw fs/buffer.c | 25 +------------ fs/super.c | 105 +++++++++++++++++++++++++++++++++++++++-------------- include/linux/fs.h | 1 + 3 files changed, 80 insertions(+), 51 deletions(-) -- 1.8.3.1
