From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Will Deacon <will.deacon@arm.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Al Viro <viro@zeniv.linux.org.uk>
Subject: Re: [PATCH v2 1/2] dcache: allow word-at-a-time name hashing with big-endian CPUs
Date: Fri, 13 Dec 2013 10:47:39 +1100 [thread overview]
Message-ID: <1386892059.15730.58.camel@pasglop> (raw)
In-Reply-To: <CA+55aFz1RwjjbdauN+Y3hbk079KTbeoXb__BHAbO+vOOb5qD6w@mail.gmail.com>
On Thu, 2013-12-12 at 10:38 -0800, Linus Torvalds wrote:
> Ok, looks good. So I'm taking these even though it's outside the merge
> window - they're small, and until you enable DCACHE_WORD_ACCESS on
> big-endian they don't actually do anything.
>
> Ben - you might want to check if this makes DCACHE_WORD_ACCESS useful
> on PowerPC too. Right now that requires an efficient fls()
> implementation, but I think you have "cntlz" like ARM does.
Thanks. I'll see if I can get somebody to measure it. It should be good
though.
Cheers,
Ben.
prev parent reply other threads:[~2013-12-12 23:47 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-12 17:40 [PATCH v2 1/2] dcache: allow word-at-a-time name hashing with big-endian CPUs Will Deacon
2013-12-12 17:40 ` [PATCH v2 2/2] word-at-a-time: provide generic big-endian zero_bytemask implementation Will Deacon
2013-12-12 18:38 ` [PATCH v2 1/2] dcache: allow word-at-a-time name hashing with big-endian CPUs Linus Torvalds
2013-12-12 23:47 ` Benjamin Herrenschmidt [this message]
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