From: Ian Lance Taylor <iant@google.com>
To: "H.J. Lu" <hjl.tools@gmail.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>,
John Reiser <jreiser@bitwagon.com>,
binutils@sourceware.org
Subject: Re: Help needed to track down bug: linking Linux kernel with gold creates unbootable kernel
Date: Fri, 23 Apr 2010 01:21:00 -0000 [thread overview]
Message-ID: <mcrbpdbx8tc.fsf@dhcp-172-17-9-151.mtv.corp.google.com> (raw)
In-Reply-To: <x2h6dc9ffc81004221723n6151420and3cb9d57df211f31@mail.gmail.com> (H. J. Lu's message of "Thu\, 22 Apr 2010 17\:23\:55 -0700")
"H.J. Lu" <hjl.tools@gmail.com> writes:
> 2MB maximum page size may have a bigger gap between PT_LOAD
> segment in memory than 4KB maximum page size. But it doesn't necessarily
> use more memory nor disk space. Since x86_64 is 64bit, address
> space shouldn't be an issue in vast majority cases. I'd like to hear
> a case to say otherwise.
The increased use of address space was an issue with x86_64 binaries
which opened hundreds of shared libraries. Each shared library was
burning 2 megabytes of address space between the text and data
segments. This in turn caused trouble with setting limits on the
amount of virtual memory which could be allocated: greatly increasing
the limits to permit hundreds of shared libraries meant that the
limits were unreasonably high for programs with only a couple of
shared libraries. This was a problem we found with GNU ld a while
back. While other workarounds were possible, using -z max-page-size
was a simple one. I didn't see any reason to carry that problem
forward with gold, given that extremely few programs need -z
max-page-size larger than 0x1000 on x86_64.
Ian
next prev parent reply other threads:[~2010-04-23 1:21 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-09 19:25 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 [this message]
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
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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