linux-ext4 - [PATCH 0/2] ext2, ext3: speed up file create workloads

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Date:	Tue, 07 Dec 2010 11:47:51 -0600
From:	Eric Sandeen <sandeen@...hat.com>
To:	ext4 development <linux-ext4@...r.kernel.org>
CC:	Jan Kara <jack@...e.cz>
Subject: [PATCH 0/2] ext2, ext3: speed up file create workloads

The addition of 64k block capability in the rec_len_from_disk
and rec_len_to_disk functions added a bit of math overhead which
slows down file create workloads needlessly when the architecture
cannot even support 64k blocks, thanks to page size limits.

The directory entry checking can also be optimized a bit
by sprinkling in some unlikely() conditions to move the
error handling out of line.

These 2 patches speed up a bonnie++ file creation workload for
me by several percent on ext2 & ext3.

Thanks,
-Eric
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