From: Theodore Ts'o <tytso@mit.edu>
To: "Lukáš Czerner" <lczerner@redhat.com>
Cc: Ext4 Developers List <linux-ext4@vger.kernel.org>
Subject: Re: [PATCH 3/6] libext2fs: add ext2fs_bitcount() function
Date: Mon, 26 Nov 2012 09:06:38 -0500 [thread overview]
Message-ID: <20121126140638.GC31891@thunk.org> (raw)
In-Reply-To: <alpine.LFD.2.00.1211261123400.18234@localhost>
On Mon, Nov 26, 2012 at 11:30:55AM +0100, Lukáš Czerner wrote:
> > +unsigned int ext2fs_bitcount(const void *addr, unsigned int count)
> > +{
> > + const unsigned char *cp = addr;
> > + const __u32 *p = addr;
> > + unsigned int res = 0;
> > +
>
> Again it is assumed that 8 will always be aliquot of 'count', but
> it might be worth having a check for that ?
In this case "count" is in bytes, since that's the only thing that
makes sense. I'll rename the variable to nbytes to make this clear.
- Ted
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next prev parent reply other threads:[~2012-11-26 14:06 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-25 0:36 [RFC PATCH 0/6] Optimize e2fsck for large file systems Theodore Ts'o
2012-11-25 0:36 ` [PATCH 1/6] libext2fs: optimize rb_set_bmap_range() Theodore Ts'o
2012-11-26 9:40 ` Lukáš Czerner
2012-11-26 13:36 ` Theodore Ts'o
2012-11-25 0:36 ` [PATCH 2/6] e2fsck: optimize pass1 for CPU time Theodore Ts'o
2012-11-26 10:06 ` Lukáš Czerner
2012-11-25 0:36 ` [PATCH 3/6] libext2fs: add ext2fs_bitcount() function Theodore Ts'o
2012-11-26 10:30 ` Lukáš Czerner
2012-11-26 14:06 ` Theodore Ts'o [this message]
2012-11-26 14:10 ` [PATCH 3/6 -v2] " Theodore Ts'o
2012-11-26 14:12 ` [PATCH 4/6 -v3] " Theodore Ts'o
2012-11-25 0:36 ` [PATCH 4/6] libext2fs: optimize rb_get_bmap_range() Theodore Ts'o
2012-11-26 10:46 ` Lukáš Czerner
2012-11-25 0:36 ` [PATCH 5/6] libext2fs: optimize rb_get_bmap_range() for mostly allocated bmaps Theodore Ts'o
2012-11-26 11:22 ` Lukáš Czerner
2012-11-26 14:17 ` Theodore Ts'o
2012-11-25 0:36 ` [PATCH 6/6] e2fsck: optimize pass 5 for CPU utilization Theodore Ts'o
2012-11-26 11:59 ` Lukáš Czerner
2012-11-25 5:09 ` [RFC PATCH 0/6] Optimize e2fsck for large file systems Theodore Ts'o
2012-11-26 9:19 ` Lukáš Czerner
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