linux-kernel - [RFC PATCH] Expand memblock=debug to provide a bit more details (v1).

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Fri,  4 May 2012 14:49:40 -0400
From:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:	linux-kernel@...r.kernel.org, tj@...nel.org, hpa@...ux.intel.com,
	yinghai@...nel.org, paul.gortmaker@...driver.com,
	akpm@...ux-foundation.org, linux-mm@...ck.org
Subject: [RFC PATCH] Expand memblock=debug to provide a bit more details (v1).

While trying to track down some memory allocation issues, I realized that
memblock=debug was giving some information, but for guests with 256GB or
so the majority of it was just:

 memblock_reserve: [0x00003efeeea000-0x00003efeeeb000] __alloc_memory_core_early+0x5c/0x64

which really didn't tell me that much. With these patches I know it is:

 memblock_reserve: [0x00003ffe724000-0x00003ffe725000] (4kB) vmemmap_pmd_populate+0x4b/0xa2

.. which isn't really that useful for the problem I was tracking down, but
it does help in figuring out which routines are using memblock.

Please see the patches - not sure what is in the future for memblock.c
so if they are running afoul of some future grand plans - I can rebase them.

Thanks!
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/