From: "H.J. Lu" <hjl.tools@gmail.com>
To: Alan Modra <amodra@gmail.com>
Cc: binutils@sourceware.org, goldstein.w.n@gmail.com
Subject: Re: [PATCH 0/4] elf: Use mmap to map in section contents
Date: Wed, 6 Mar 2024 08:16:54 -0800 [thread overview]
Message-ID: <CAMe9rOrPxTYFC9UqBtQgymzm01XazLJzKaUULT1mY57P-gMapQ@mail.gmail.com> (raw)
In-Reply-To: <Zee98D8It1VCWv7M@squeak.grove.modra.org>
On Tue, Mar 5, 2024 at 4:51 PM Alan Modra <amodra@gmail.com> wrote:
>
> On Tue, Mar 05, 2024 at 09:00:53AM -0800, H.J. Lu wrote:
> > We can use mmap to map in ELF section contents, instead of copying them
> > into memory by hand. We don't need to cache symbol nor relocation tables
> > if they are mapped in. Data to link the 3.5GB clang executable in LLVM
> > 17 debug build on Linux/x86-64 with 32GB RAM is:
>
> I like the idea. Some comments on the patch:
> - You should probably replace occurrences of HAVE_MMAP with USE_MMAP,
> and change the config default for --with-mmap.
Fixed.
> - There doesn't seem to be any reason to have an asize parameter to
> _bfd_mmap_readonly_tracked if you are going to give an error on
> unterminated string tables. (BTW, I don't disagree with giving an
> error.)
Fixed.
> - Can you put contents_addr in bfd_elf_section_data rather than
> bfd_section so that the extra pointer doesn't affect non-ELF
> targets?
Fixed.
> - _bfd_link_keep_memory should probably be moved to elflink.c, renamed
> to _elf_link_keep_memory and declared in elf-bfd.h.
>
I renamed it to _bfd_elf_link_keep_memory.
Here is the v2 patch:
https://patchwork.sourceware.org/project/binutils/list/?series=31657
Thanks.
--
H.J.
next prev parent reply other threads:[~2024-03-06 16:17 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-05 17:00 H.J. Lu
2024-03-05 17:00 ` [PATCH 1/4] elf: Use mmap to map in read-only sections H.J. Lu
2024-03-05 17:00 ` [PATCH 2/4] elf: Add _bfd_elf_mmap_section and _bfd_elf_munmap_section_contents H.J. Lu
2024-03-05 17:00 ` [PATCH 3/4] elf: Use mmap to map in symbol and relocation tables H.J. Lu
2024-03-05 17:00 ` [PATCH 4/4] elf: Don't cache symbol nor relocation tables with mmap H.J. Lu
2024-03-05 17:03 ` [PATCH 0/4] elf: Use mmap to map in section contents Noah Goldstein
2024-03-06 0:50 ` Alan Modra
2024-03-06 16:16 ` H.J. Lu [this message]
2024-03-06 20:51 ` H.J. Lu
2024-03-06 4:45 ` Sam James
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=CAMe9rOrPxTYFC9UqBtQgymzm01XazLJzKaUULT1mY57P-gMapQ@mail.gmail.com \
--to=hjl.tools@gmail.com \
--cc=amodra@gmail.com \
--cc=binutils@sourceware.org \
--cc=goldstein.w.n@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).