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
| ||
|
Date: Tue, 28 Feb 2017 16:43:45 -0800 From: Dave Hansen <dave.hansen@...el.com> To: Andrew Morton <akpm@...ux-foundation.org>, Aaron Lu <aaron.lu@...el.com> Cc: linux-mm@...ck.org, linux-kernel@...r.kernel.org, Tim Chen <tim.c.chen@...el.com>, Ying Huang <ying.huang@...el.com> Subject: Re: [PATCH 0/5] mm: support parallel free of memory On 02/28/2017 04:39 PM, Andrew Morton wrote: > Dumb question: why not do this in userspace, presumably as part of the > malloc() library? malloc knows where all the memory is and should be > able to kick off N threads to run around munmapping everything? One of the places we saw this happen was when an app crashed and was exit()'ing under duress without cleaning up nicely. The time that it takes to unmap a few TB of 4k pages is pretty excessive.
Powered by blists - more mailing lists