From: John Reiser <jreiser@bitwagon.com>
To: binutils@sourceware.org
Subject: Re: gold patch committed (Was: Re: Help needed to track down bug: linking Linux kernel with gold creates unbootable kernel)
Date: Fri, 23 Apr 2010 14:40:00 -0000 [thread overview]
Message-ID: <4BD1B151.4090209@bitwagon.com> (raw)
In-Reply-To: <mcrljcew94y.fsf@dhcp-172-17-9-151.mtv.corp.google.com>
On 04/23/2010 07:12 AM, Ian Lance Taylor wrote:
>> .text
>> .p2align 23
[[snip]]
> Is your concern that
> the operating system will not be able to align the physical memory
> address as required by the program header alignment? I don't see why
> that would matter on a virtual memory system.
The hardware should not care, but the software might. For instance,
if the alignment is honored on a 32-bit system, then a pointer to
the beginning of the area can be represented using only (32 - 23) = 9
bits, which offers an opportunity to reduce storage costs. Also,
that much alignment often can exert an influence on the performance
of caches (including TLB), particularly by reducing the variability
from run to run.
--
next prev parent reply other threads:[~2010-04-23 14:40 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-09 19:25 Help needed to track down bug: linking Linux kernel with gold creates unbootable kernel Török Edwin
2010-04-09 22:24 ` Ian Lance Taylor
2010-04-09 22:52 ` Doug Kwan (關振德)
2010-04-10 12:52 ` Török Edwin
2010-04-11 18:25 ` John Reiser
2010-04-12 9:39 ` Török Edwin
2010-04-12 15:17 ` John Reiser
2010-04-12 18:52 ` Török Edwin
2010-04-12 20:49 ` John Reiser
2010-04-13 5:27 ` Ian Lance Taylor
2010-04-22 21:10 ` H.J. Lu
2010-04-22 21:21 ` H.J. Lu
2010-04-22 21:27 ` Suresh Siddha
2010-04-23 0:00 ` Ian Lance Taylor
2010-04-23 0:24 ` H.J. Lu
2010-04-23 1:21 ` Ian Lance Taylor
2010-04-23 1:46 ` H.J. Lu
2010-04-23 1:58 ` David Miller
2010-04-23 2:38 ` H.J. Lu
2010-04-23 3:05 ` Ian Lance Taylor
2010-04-23 4:27 ` H.J. Lu
2010-04-22 21:25 ` John Reiser
2010-04-23 4:49 ` gold patch committed (Was: Re: Help needed to track down bug: linking Linux kernel with gold creates unbootable kernel) Ian Lance Taylor
2010-04-23 12:44 ` H.J. Lu
2010-04-23 14:12 ` Ian Lance Taylor
2010-04-23 14:35 ` H.J. Lu
2010-04-23 14:43 ` Ian Lance Taylor
2010-04-23 14:47 ` H.J. Lu
2010-04-23 15:31 ` Ian Lance Taylor
2010-04-23 15:39 ` H.J. Lu
2010-04-23 14:44 ` H.J. Lu
2010-04-23 15:16 ` Ian Lance Taylor
2010-04-23 15:30 ` H.J. Lu
2010-04-23 15:50 ` Ian Lance Taylor
2010-04-23 17:57 ` H.J. Lu
2010-04-23 15:55 ` John Reiser
2010-04-23 14:40 ` John Reiser [this message]
2010-04-23 14:02 ` Török Edwin
2010-04-23 14:48 ` H.J. Lu
2010-04-23 14:51 ` Török Edwin
2010-04-23 23:30 ` Ian Lance Taylor
2010-04-24 7:29 ` Török Edwin
2010-04-22 23:57 ` Help needed to track down bug: linking Linux kernel with gold creates unbootable kernel Ian Lance Taylor
2010-04-12 17:48 ` Ian Lance Taylor
2010-04-12 18:04 ` Török Edwin
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