From: David Laight <David.Laight@ACULAB.COM>
To: "'Thomas Weißschuh'" <linux@weissschuh.net>,
"Josh Poimboeuf" <jpoimboe@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: RE: [PATCH v2 0/8] objtool: reduce maximum memory usage
Date: Wed, 1 Feb 2023 12:51:46 +0000 [thread overview]
Message-ID: <093273245f624bcab3fac9d391f6d249@AcuMS.aculab.com> (raw)
In-Reply-To: <20230131035442.yzq4opasci7azt2j@t-8ch.de>
From: Thomas Weißschuh.
> Sent: 31 January 2023 03:55
...
> I have another half-finished series that replaces the doubly-linked
> list_heads used by elf.h with a custom singly-linked list.
> This would save a few pointers per struct.
>
> Do you think this is worth it?
If you allocate the structures in blocks of (say) 256 you
can use an array of pointers to the blocks and then a
32bit index instead of a 64bit pointer.
For real space-saving you might decide that the index can
never exceed 2^^24 and use a bitfield!
David
-
Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK
Registration No: 1397386 (Wales)
prev parent reply other threads:[~2023-02-01 12:51 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-27 16:00 [PATCH v2 0/8] reduce maximum memory usage Thomas Weißschuh
2022-12-27 16:00 ` [PATCH v2 1/8] objtool: make struct entries[] static and const Thomas Weißschuh
2023-02-01 16:26 ` [tip: objtool/core] objtool: Make " tip-bot2 for Thomas Weißschuh
2023-02-04 10:17 ` tip-bot2 for Thomas Weißschuh
2022-12-27 16:00 ` [PATCH v2 2/8] objtool: make struct check_options static Thomas Weißschuh
2023-02-01 16:26 ` [tip: objtool/core] objtool: Make " tip-bot2 for Thomas Weißschuh
2023-02-04 10:17 ` tip-bot2 for Thomas Weißschuh
2022-12-27 16:00 ` [PATCH v2 3/8] objtool: allocate multiple structures with calloc() Thomas Weißschuh
2023-01-30 23:53 ` Josh Poimboeuf
2023-02-01 16:26 ` [tip: objtool/core] objtool: Allocate " tip-bot2 for Thomas Weißschuh
2023-02-04 10:17 ` tip-bot2 for Thomas Weißschuh
2022-12-27 16:01 ` [PATCH v2 4/8] objtool: introduce function elf_reloc_set_type Thomas Weißschuh
2022-12-27 16:01 ` [PATCH v2 5/8] objtool: reduce memory usage of struct reloc Thomas Weißschuh
2022-12-29 1:33 ` Rong Tao
2022-12-29 2:26 ` Thomas Weißschuh
2022-12-29 3:29 ` Rong Tao
2022-12-29 5:57 ` Thomas Weißschuh
2023-01-30 23:59 ` Josh Poimboeuf
2022-12-27 16:01 ` [PATCH v2 6/8] objtool: optimize layout of struct symbol Thomas Weißschuh
2023-02-01 16:26 ` [tip: objtool/core] objtool: Optimize " tip-bot2 for Thomas Weißschuh
2023-02-04 10:17 ` tip-bot2 for Thomas Weißschuh
2022-12-27 16:01 ` [PATCH v2 7/8] objtool: optimize layout of struct special_alt Thomas Weißschuh
2023-02-01 16:26 ` [tip: objtool/core] objtool: Optimize " tip-bot2 for Thomas Weißschuh
2023-02-04 10:17 ` tip-bot2 for Thomas Weißschuh
2022-12-27 16:01 ` [PATCH v2 8/8] objtool: explicitly cleanup resources on success Thomas Weißschuh
2023-01-31 0:02 ` Josh Poimboeuf
2023-01-29 21:43 ` [PATCH v2 0/8] objtool: reduce maximum memory usage Thomas Weißschuh
2023-01-31 0:03 ` Josh Poimboeuf
2023-01-31 3:54 ` Thomas Weißschuh
2023-01-31 17:27 ` Josh Poimboeuf
2023-02-07 17:30 ` Josh Poimboeuf
2023-02-01 12:51 ` David Laight [this message]
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