Chao Yu 46008c6d42 f2fs: support in batch multi blocks preallocation ... This patch introduces reserve_new_blocks to make preallocation of multi blocks as in batch operation, so it can avoid lots of redundant operation, result in better performance. In virtual machine, with rotational device: time fallocate -l 32G /mnt/f2fs/file Before: real 0m4.584s user 0m0.000s sys 0m4.580s After: real 0m0.292s user 0m0.000s sys 0m0.272s In x86, with SSD: time fallocate -l 500G $MNT/testfile Before : 24.758 s After : 1.604 s Signed-off-by: Chao Yu <yuchao0@huawei.com> [Jaegeuk Kim: fix bugs and add performance numbers measured in x86.] Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>		2016-05-11 09:56:35 -07:00
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events	f2fs: support in batch multi blocks preallocation	2016-05-11 09:56:35 -07:00
define_trace.h	tracing: Introduce TRACE_EVENT_FN_COND macro	2015-12-23 14:27:21 -05:00
perf.h	tracing: Move non perf code out of perf.h	2015-09-23 09:31:34 -04:00
syscall.h	tracing: Rename ftrace_event_{call,class} to trace_event_{call,class}	2015-05-13 14:06:10 -04:00
trace_events.h	tracing: Introduce TRACE_EVENT_FN_COND macro	2015-12-23 14:27:21 -05:00