Ross Zwisler 4384cd4bb0 jbd2: introduce jbd2_inode dirty range scoping ... commit 6ba0e7dc64 upstream. Currently both journal_submit_inode_data_buffers() and journal_finish_inode_data_buffers() operate on the entire address space of each of the inodes associated with a given journal entry. The consequence of this is that if we have an inode where we are constantly appending dirty pages we can end up waiting for an indefinite amount of time in journal_finish_inode_data_buffers() while we wait for all the pages under writeback to be written out. The easiest way to cause this type of workload is do just dd from /dev/zero to a file until it fills the entire filesystem. This can cause journal_finish_inode_data_buffers() to wait for the duration of the entire dd operation. We can improve this situation by scoping each of the inode dirty ranges associated with a given transaction. We do this via the jbd2_inode structure so that the scoping is contained within jbd2 and so that it follows the lifetime and locking rules for that structure. This allows us to limit the writeback & wait in journal_submit_inode_data_buffers() and journal_finish_inode_data_buffers() respectively to the dirty range for a given struct jdb2_inode, keeping us from waiting forever if the inode in question is still being appended to. Signed-off-by: Ross Zwisler <zwisler@google.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Reviewed-by: Jan Kara <jack@suse.cz> Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2019-07-31 07:28:47 +02:00
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acpi	ACPICA: Reference Counts: increase max to 0x4000 for large servers	2019-03-19 13:13:21 +01:00
asm-generic	futex: Update comments and docs about return values of arch futex code	2019-07-03 13:16:03 +02:00
clocksource
crypto	crypto: vmac - separate tfm and request context	2018-08-17 21:01:10 +02:00
drm	drm: don't block fb changes for async plane updates	2019-06-15 11:55:00 +02:00
dt-bindings
keys	keys: Fix dependency loop between construction record and auth key	2019-03-23 14:35:14 +01:00
kvm
linux	jbd2: introduce jbd2_inode dirty range scoping	2019-07-31 07:28:47 +02:00
math-emu
media	media: cec: make cec_get_edid_spa_location() an inline function	2019-05-16 19:42:26 +02:00
memory
misc
net	tcp: fix tcp_set_congestion_control() use from bpf hook	2019-07-31 07:28:46 +02:00
pcmcia
ras
rdma	IB/rxe: Revise the ib_wr_opcode enum	2019-05-16 19:42:25 +02:00
scsi	scsi: fcoe: make use of fip_mode enum complete	2019-04-05 22:31:31 +02:00
soc	memory: tegra: Apply interrupts mask per SoC	2018-08-03 07:50:38 +02:00
sound	ALSA: compress: Fix stop handling on compressed capture streams	2019-02-12 19:46:11 +01:00
target
trace	sched, trace: Fix prev_state output in sched_switch tracepoint	2019-02-20 10:20:55 +01:00
uapi	nilfs2: do not use unexported cpu_to_le32()/le32_to_cpu() in uapi header	2019-07-21 09:04:16 +02:00
video	udlfb: set optimal write delay	2018-09-09 19:56:01 +02:00
xen	xen/events: fix binding user event channels to cpus	2019-07-31 07:28:39 +02:00