WSL2-Linux-Kernel/include
Paul Gortmaker 169f1a2a87 jbd2: use a single printk for jbd_debug()
Since the jbd_debug() is implemented with two separate printk()
calls, it can lead to corrupted and misleading debug output like
the following (see lines marked with "*"):

[  290.339362] (fs/jbd2/journal.c, 203): kjournald2: kjournald2 wakes
[  290.339365] (fs/jbd2/journal.c, 155): kjournald2: commit_sequence=42103, commit_request=42104
[  290.339369] (fs/jbd2/journal.c, 158): kjournald2: OK, requests differ
[* 290.339376] (fs/jbd2/journal.c, 648): jbd2_log_wait_commit:
[* 290.339379] (fs/jbd2/commit.c, 370): jbd2_journal_commit_transaction: JBD2: want 42104, j_commit_sequence=42103
[* 290.339382] JBD2: starting commit of transaction 42104
[  290.339410] (fs/jbd2/revoke.c, 566): jbd2_journal_write_revoke_records: Wrote 0 revoke records
[  290.376555] (fs/jbd2/commit.c, 1088): jbd2_journal_commit_transaction: JBD2: commit 42104 complete, head 42079

i.e. the debug output from log_wait_commit and journal_commit_transaction
have become interleaved.  The output should have been:

(fs/jbd2/journal.c, 648): jbd2_log_wait_commit: JBD2: want 42104, j_commit_sequence=42103
(fs/jbd2/commit.c, 370): jbd2_journal_commit_transaction: JBD2: starting commit of transaction 42104

It is expected that this is not easy to replicate -- I was only able
to cause it on preempt-rt kernels, and even then only under heavy
I/O load.

Reported-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Suggested-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2013-06-12 23:04:04 -04:00
..
acpi ACPI: Fix section to __init. Align with usage in acpixf.h 2013-05-12 14:03:14 +02:00
asm-generic Merge branch 'timers-nohz-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2013-05-05 13:23:27 -07:00
clocksource ARM: late Exynos multiplatform changes 2013-05-07 11:28:42 -07:00
crypto crypto: sha512 - Expose generic sha512 routine to be callable from other modules 2013-04-25 21:00:57 +08:00
drm Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux 2013-05-16 19:01:46 -07:00
dt-bindings
keys
linux jbd2: use a single printk for jbd_debug() 2013-06-12 23:04:04 -04:00
math-emu
media Merge branch 'topic/omap3isp' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media 2013-05-01 09:57:04 -07:00
memory
misc
net ipv6: do not clear pinet6 field 2013-05-11 16:26:38 -07:00
pcmcia
ras
rdma
rxrpc
scsi Merge branch 'postmerge' into for-linus 2013-05-10 07:54:01 -07:00
sound sound fixes for v3.10-rc1 2013-05-10 07:51:56 -07:00
target target: removed unused transport_state flag 2013-05-15 01:46:53 -07:00
trace ext4: use ext4_da_writepages() for all modes 2013-06-06 14:00:46 -04:00
uapi Merge git://git.infradead.org/users/eparis/audit 2013-05-11 14:29:11 -07:00
video Merge branch 'late/clksrc' into late/cleanup 2013-05-06 23:43:45 +02:00
xen Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2013-05-01 14:08:52 -07:00
Kbuild UAPI: remove empty Kbuild files 2013-04-30 17:04:09 -07:00