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/openbmc/linux/include/trace/events/ |
H A D | ext4.h | 3e1e5f50 Wed Oct 27 20:30:07 CDT 2010 Eric Sandeen <sandeen@redhat.com> ext4: don't use ext4_allocation_contexts for tracing
Many tracepoints were populating an ext4_allocation_context to pass in, but this requires a slab allocation even when tracepoints are off. In fact, 4 of 5 of these allocations were only for tracing. In addition, we were only using a small fraction of the 144 bytes of this structure for this purpose.
We can do away with all these alloc/frees of the ac and simply pass in the bits we care about, instead.
I tested this by turning on tracing and running through xfstests on x86_64. I did not actually do anything with the trace output, however.
Signed-off-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> 3e1e5f50 Wed Oct 27 20:30:07 CDT 2010 Eric Sandeen <sandeen@redhat.com> ext4: don't use ext4_allocation_contexts for tracing Many tracepoints were populating an ext4_allocation_context to pass in, but this requires a slab allocation even when tracepoints are off. In fact, 4 of 5 of these allocations were only for tracing. In addition, we were only using a small fraction of the 144 bytes of this structure for this purpose. We can do away with all these alloc/frees of the ac and simply pass in the bits we care about, instead. I tested this by turning on tracing and running through xfstests on x86_64. I did not actually do anything with the trace output, however. Signed-off-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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/openbmc/linux/fs/ext4/ |
H A D | mballoc.c | 3e1e5f50 Wed Oct 27 20:30:07 CDT 2010 Eric Sandeen <sandeen@redhat.com> ext4: don't use ext4_allocation_contexts for tracing
Many tracepoints were populating an ext4_allocation_context to pass in, but this requires a slab allocation even when tracepoints are off. In fact, 4 of 5 of these allocations were only for tracing. In addition, we were only using a small fraction of the 144 bytes of this structure for this purpose.
We can do away with all these alloc/frees of the ac and simply pass in the bits we care about, instead.
I tested this by turning on tracing and running through xfstests on x86_64. I did not actually do anything with the trace output, however.
Signed-off-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> 3e1e5f50 Wed Oct 27 20:30:07 CDT 2010 Eric Sandeen <sandeen@redhat.com> ext4: don't use ext4_allocation_contexts for tracing Many tracepoints were populating an ext4_allocation_context to pass in, but this requires a slab allocation even when tracepoints are off. In fact, 4 of 5 of these allocations were only for tracing. In addition, we were only using a small fraction of the 144 bytes of this structure for this purpose. We can do away with all these alloc/frees of the ac and simply pass in the bits we care about, instead. I tested this by turning on tracing and running through xfstests on x86_64. I did not actually do anything with the trace output, however. Signed-off-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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