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: Thu, 9 Apr 2020 10:23:26 +0800 From: Chao Yu <yuchao0@...wei.com> To: Jaegeuk Kim <jaegeuk@...nel.org> CC: <linux-kernel@...r.kernel.org>, <linux-f2fs-devel@...ts.sourceforge.net>, <kernel-team@...roid.com> Subject: Re: [f2fs-dev] [PATCH] f2fs: introduce sysfs/data_io_flag to attach REQ_META/FUA On 2020/4/9 10:20, Jaegeuk Kim wrote: > On 04/07, Chao Yu wrote: >> On 2020/4/7 10:59, Jaegeuk Kim wrote: >>> On 04/07, Chao Yu wrote: >>>> On 2020/4/4 0:12, Jaegeuk Kim wrote: >>>>> This patch introduces a way to attach REQ_META/FUA explicitly >>>>> to all the data writes given temperature. >>>>> >>>>> -> attach REQ_FUA to Hot Data writes >>>>> >>>>> -> attach REQ_FUA to Hot|Warm Data writes >>>>> >>>>> -> attach REQ_FUA to Hot|Warm|Cold Data writes >>>>> >>>>> -> attach REQ_FUA to Hot|Warm|Cold Data writes as well as >>>>> REQ_META to Hot Data writes >>>> >>>> Out of curiosity, what scenario it is used for? >>> >>> It's testing purpose to compare the bandwidths per different IO flags. >> >> Thanks for the hint. :) >> >> As nobarrier was set in Android, so REQ_PREFLUSH will not be considered in >> this sysfs interface? > > I don't see any diff on performance, so not interesting. :) I doubt it may has diff on non-ufs/emmc device? just guess. Thanks, > >> >> Thanks, >> >>> >>>> >>>> Thanks, >>> . >>> > . >
Powered by blists - more mailing lists