linux-stable.git/include/trace/events/ext4.h, branch v3.8

ext4: split off ext4_journalled_invalidatepage()

2012-12-25T18:28:54+00:00

In data=journal mode we don't need delalloc or DIO handling in invalidatepage
and similarly in other modes we don't need the journal handling. So split
invalidatepage implementations.

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

ext4: add some tracepoints in extent status tree

2012-11-09T02:57:33+00:00

This patch adds some tracepoints in extent status tree.

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

ext4: print map->m_flags in trace_ext4_ext/ind_map_blocks_exit

2012-11-08T19:34:04+00:00

When we use trace_ext4_ext/ind_map_blocks_exit, print the value of
map->m_flags in order that we can understand the extent's current
status.

Reviewed-by: Lukas Czerner 
Signed-off-by: Zheng Liu 
Signed-off-by: "Theodore Ts'o"

ext4: print 'flags' in ext4_ext_handle_uninitialized_extents

2012-11-08T19:33:43+00:00

In trace_ext4_ext_handle_uninitialized_extents we don't care about the
value of map->m_flags because this value is probably 0, and we prefer
to get the value of flags because we can know how to handle this
extent in this function.

Reviewed-by: Lukas Czerner 
Signed-off-by: Zheng Liu 
Signed-off-by: "Theodore Ts'o"

ext4: add missing space to trace message

2012-08-17T13:52:17+00:00

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

ext4: realign trace events structs to make it smaller

2012-08-17T13:50:17+00:00

Most hardware architectures require that data (including struct fields)
have to be aligned in memory. To make it happen compiler inserts padding
between struct fields if they are not aligned correctly.

Reorder fields to remove paddings and make structures denser. Making data
smaller saves some memory that is very important for trace events.
Tracing buffer has limited size and making objects smaller we can put more
of them without overflowing the tracing buffer.

To find data struct holes I used 'pahole -H 1 -E -I vmlinux.o' from
'dwarves' package.

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

userns: Convert ext4 to user kuid/kgid where appropriate

2012-05-15T21:59:27+00:00

Acked-by: Serge Hallyn 
Signed-off-by: Eric W. Biederman

ext4: do not reference pa_inode from group_pa

2011-12-18T20:49:54+00:00

pa_inode in group_pa is set NULL in ext4_mb_new_group_pa, so
pa_inode should be not referenced.

Reported-by: Wu Fengguang 
Signed-off-by: Yongqiang Yang 
Signed-off-by: "Theodore Ts'o"

ext4: optimize ext4_ext_convert_to_initialized()

2011-10-27T15:43:23+00:00

This patch introduces a fast path in ext4_ext_convert_to_initialized()
for the case when the conversion can be performed by transferring
the newly initialized blocks from the uninitialized extent into
an adjacent initialized extent. Doing so removes the expensive
invocations of memmove() which occur during extent insertion and
the subsequent merge.

In practice this should be the common case for clients performing
append writes into files pre-allocated via
fallocate(FALLOC_FL_KEEP_SIZE). In such a workload performed via
direct IO and when using a suboptimal implementation of memmove()
(x86_64 prior to the 2.6.39 rewrite), this patch reduces kernel CPU
consumption by 32%.

Two new trace points are added to ext4_ext_convert_to_initialized()
to offer visibility into its operations. No exit trace point has
been added due to the multiplicity of return points. This can be
revisited once the upstream cleanup is backported.

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

ext4: add some tracepoints in ext4/extents.c

2011-09-09T23:18:51+00:00

This patch adds some tracepoints in ext4/extents.c and updates a tracepoint in
ext4/inode.c.

Tested: Built and ran the kernel and verified that these tracepoints work.
Also ran xfstests.

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