Re: 20120419 disk scheduler

[Mike Galbraith]

æäçéåå LKML èèåäéèèçæçã

On Thu, 2012-04-19 at 17:15 +0800, sunzixun wrote: 
> -èåå(110781198) 3:33:12 PM
> éääééï åäääblock æäåIOïèçäçèdisk scheduleréäåïææéçåæ æäæ æææåäIO
> scheduleréåääèèäblockéé sectorååååéç sectors äåæååéçåèflushåççäã
> eric(3251550) 3:33:31 PM
> äèåã
> ååè (448981776) 3:36:36 PM
> æèåèçåï
> -eric(3251550) 3:38:35 PM
> äèïååæã
> eric(3251550) 3:38:52 PM
> ioååéæåã
> -eric(3251550) 3:39:11 PM
> èæäåãèçbarrier ioèçæåã
> ååè (448981776) 3:39:13 PM
> åç block size åæåsectoräæå
> ååè (448981776) 3:40:04 PM
> ææèèæåèåäå
> -eric(3251550) 3:40:13 PM
> ééèäääioïèääèèæåã
> eric(3251550) 3:40:36 PM
> blockåsectoräæåãèèäåéçsectorååéçsector
> ååè (448981776) 3:41:22 PM
> å äçååèææ
> ååè (448981776) 3:41:39 PM
> äæå æåääèç ããéääæå æäääèå
> eric(3251550) 3:43:09 PM
> ääæåããåéçäãã
>   -eric(3251550) 3:43:17 PM
> èèæåã
>   -eric(3251550) 3:43:43 PM
> åioéèèææ4kï4kåçã
>   -eric(3251550) 3:44:02 PM
> äèéåïåæäéçääççææåçã
>   -eric(3251550) 3:44:06 PM
> barrier io.
>   -ååè (448981776) 3:44:20 PM
> çææèèææ
>   -eric(3251550) 3:44:55 PM
> çææã
>   -ååè (448981776) 3:49:05 PM
> ååæé åæäèæsector ïèæåææççççèåï
>   -ååè (448981776) 3:49:29 PM
> åæçèraid cache ïççäååå  éçååæää
>   -ååè (448981776) 3:50:18 PM
> 
>   -BJ-èåå(110781198) 3:52:12 PM
> æ  åèæäèäèçïåççåçååäçåå
>   -BJ-èåå(110781198) 3:53:08 PM
> äåæäæçåçççïèæSANçéçï IOèèfiber channelæèinfinibandåèåçççïæäæääèäè
>   -eric(3251550) 3:53:20 PM
> éäèã
>   -ååè (448981776) 3:55:22 PM
> äé io sched æèåèåæåäç
>   -ååè (448981776) 3:55:30 PM
> äæçä éèåäè
>   -eric(3251550) 3:56:05 PM
> io schedääèãã
>   -BJ-èåå(110781198) 3:56:06 PM
> æèåèå åæéçæå  åèäæåèèåésectorçæéååéæåï
>   -eric(3251550) 3:56:38 PM
> æéææåçãäæéæåèèéæåäã
>   -eric(3251550) 3:56:58 PM
> èåèèèéæçæåã
>   -BJ-èåå(110781198) 3:57:06 PM
> èéæåäçæå  æèèåäåçï
>   -ååè (448981776) 3:57:11 PM
> io sched ääääèï
>   -ååè (448981776) 3:57:39 PM
> éæåä io sched æäçéçåäæç
>   -eric(3251550) 3:57:39 PM
> éæããéæçåããèæååãççã
>   -ååè (448981776) 3:57:49 PM
> åå ïçå ååå äæéåç
>   -eric(3251550) 3:57:51 PM
> èääç çåäæã
>   -eric(3251550) 3:57:56 PM
> éæncqçåçã
>   -ååè (448981776) 3:57:58 PM
> ääèå
>   -ååè (448981776) 3:58:27 PM
> æå ääblock åæscetor 1 2 3 4
> èéääèåä èæ 4 2 1 3
>   -eric(3251550) 3:59:04 PM
> åæèåèäååï
>   -ååè (448981776) 3:59:12 PM
> æå
>   -eric(3251550) 3:59:58 PM
> èåèåääã
>   -BJ-èåå(110781198) 4:01:08 PM
> åèèååääïéäèååäé   åäæåäåèäåï
>   -eric(3251550) 4:03:28 PM
> ååæåã
>   -ååè (448981776) 4:03:45 PM
> èååäçæç ãææääçççãã
> 
> çäåååäïååæEMCåäåèæçäååå
>   -eric(3251550) 4:03:48 PM
> äååçèåèååã
>   -eric(3251550) 4:04:17 PM
> I/O barrier requests are used to guarantee ordering around the barrier requests.
>   -eric(3251550) 4:04:39 PM
> All requests queued before a barrier request must be finished (made it
> to the physical medium) before the barrier request is started, and all
> requests queued after the barrier request must be started only after
> the barrier request is finished (again, made it to the physical
> medium).
>   -eric(3251550) 4:05:04 PM
> äåãããåéçåéåæãåéçåéçäåioåæäåååæã
>   -eric(3251550) 4:05:13 PM
> èæå ææääèã
>   -eric(3251550) 4:05:51 PM
> åäè 1ï2ï3ï4ï5ääèãèåéäèäéèæåæçio
> NÐérybXèv^)è{.n+ä{èzXÐâ}èz&j:+vèzZ++zfïh~izwã?ã&)æf^jèym@Aaå0éhi


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