linux.git/include/trace/events/ext4.h, branch v2.6.32

ext4: Add a stub for mpage_da_data in the trace header

2009-09-30T04:51:22+00:00

The tracepoint ext4_da_write_pages has a struct mpage_da_data*
parameter, but that struct is only defined in fs/ext4/ext4.h.  This
patch adds a forward declaration for that struct, so this tracepoint
header can still be used by tools like SystemTap.

This is a continuation of the fix in commit 3661d286.

http://sourceware.org/bugzilla/show_bug.cgi?id=10703

Signed-off-by: Josh Stone 
Signed-off-by: "Theodore Ts'o"

ext4: Use tracepoints for mb_history trace file

2009-09-30T04:32:42+00:00

The /proc/fs/ext4//mb_history was maintained manually, and had a
number of problems: it required a largish amount of memory to be
allocated for each ext4 filesystem, and the s_mb_history_lock
introduced a CPU contention problem.  

By ripping out the mb_history code and replacing it with ftrace
tracepoints, and we get more functionality: timestamps, event
filtering, the ability to correlate mballoc history with other ext4
tracepoints, etc.

Signed-off-by: "Theodore Ts'o"

ext4: Adjust ext4_da_writepages() to write out larger contiguous chunks

2009-09-29T17:31:31+00:00

Work around problems in the writeback code to force out writebacks in
larger chunks than just 4mb, which is just too small.  This also works
around limitations in the ext4 block allocator, which can't allocate
more than 2048 blocks at a time.  So we need to defeat the round-robin
characteristics of the writeback code and try to write out as many
blocks in one inode before allowing the writeback code to move on to
another inode.  We add a a new per-filesystem tunable,
max_writeback_mb_bump, which caps this to a default of 128mb per
inode.

Signed-off-by: "Theodore Ts'o"

ext4: Add a tracepoint for ext4_alloc_da_blocks()

2009-09-16T23:30:40+00:00

Signed-off-by: "Theodore Ts'o"

ext4: Fix include/trace/events/ext4.h to work with Systemtap

2009-09-15T02:59:50+00:00

Using relative pathnames in #include statements interacts badly with
SystemTap, since the fs/ext4/*.h header files are not packaged up as
part of a distribution kernel's header files.  Since systemtap doesn't
use TP_fast_assign(), we can use a blind structure definition and then
make sure the needed header files are defined before the ext4 source
files #include the trace/events/ext4.h header file.

https://bugzilla.redhat.com/show_bug.cgi?id=512478

Signed-off-by: "Theodore Ts'o"

ext4: fix tracepoint format string warnings

2009-09-17T12:50:18+00:00

Unlike on some other architectures ino_t is an unsigned int on s390.
So add an explicit cast to avoid lots of compile warnings:

In file included from include/trace/ftrace.h:285,
                 from include/trace/define_trace.h:61,
                 from include/trace/events/ext4.h:711,
                 from fs/ext4/super.c:50:
include/trace/events/ext4.h: In function 'ftrace_raw_output_ext4_free_inode':
include/trace/events/ext4.h:12: warning: format '%lu' expects type 'long unsigned int', but argument 4 has type 'ino_t'

Signed-off-by: Heiko Carstens 
Signed-off-by: "Theodore Ts'o"

ext4: Add new tracepoint: trace_ext4_da_write_pages()

2009-09-01T03:13:11+00:00

Add a new tracepoint which shows the pages that will be written using
write_cache_pages() by ext4_da_writepages().

Signed-off-by: "Theodore Ts'o"

ext4: Fix spelling typo in the trace format for trace_ext4_da_writepages()

2009-09-17T12:48:28+00:00

Signed-off-by: "Theodore Ts'o"

writeback: get rid of wbc->for_writepages

2009-09-16T13:16:18+00:00

It's only set, it's never checked. Kill it.

Acked-by: Jan Kara 
Signed-off-by: Jens Axboe

Merge branch 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-07-15T01:34:32+00:00

* 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  tracing/function-profiler: do not free per cpu variable stat
  tracing/events: Move TRACE_SYSTEM outside of include guard