Messages in this thread |  | | Subject | Re: [f2fs-dev] [PATCH] f2fs: introduce sysfs/data_io_flag to attach REQ_META/FUA | From | Chao Yu <> | Date | Tue, 7 Apr 2020 11:40:51 +0800 |
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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?
Thanks,
> >> >> Thanks, > . >
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