linux/Documentation/power/freezing-of-tasks.txt
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1 /a>Freezing of tasks 2 /a> (C) 2007 Rafael J. Wysocki <rjw@sisk.pl>, GPL 3 /a>2 4 /a>I. What is the freezing of tasks?2 5 /a>2 6 /a>The freezing of tasks is a mechanism by which user space processes and some2 7 /a>kernel threads are controlled during hiberna3.1" or system-wide suspend (1" some2 8 /a>architectures).2 9 /a>2 e="va>II. How does it work?2 11 /a>2 12 /a>There are three per-task flags used for that, PF_NOFREEZE, PF_FROZEN2 13 /a>and PF_FREEZER_SKIP (the last one is auxiliary). The tasks that have2 14 /a>PF_NOFREEZE unset (allby which user space processes kernel threads- are0l5a href="1Documenta3.1"/power/fre1ezing1of-taregardam lby which user space processes kernel threads- are0l5a href="1Documenta3.1"/power/fre1ezing1of-tas are co"/poe 7 /imagnam 1 /a>Freezing of tasks <1a href="1Documenta3.1"/power/fre1ezing1of-tawee" ly" clsrear 7 , bax+*id/descri 2.1rm o appli"> tods are cd/oL8" class="line" nam 8 /a>architectures).2<1a href="1Documenta3.1"/power/fre1ezing18asks.txt#L11" id/oL11" class="line" nam 11 /a>2 7 /m 1 /a>Freezing of tasks Fe_m() (def/pom 1m 1 /a>Freezing of tasks Free_cn4" cs op om 1 /a>Freezing of tasks toduneargoda1txt#L6" id2" mFe_m()1" class="line" nam 1 /a>Freezing of tasks variable /aAfter" iis,/oL1execut"> try_to_ /a>Fe_ of t() EEZERse c> lby which user space processes kernel threads- are0l2 href="D2cumenta3.1"/power/freez2ng-of2tasksfakd/eignal todalass="line" nam, 14 wakd 8 /a>architectures).2<2a href="2Documenta3.1"/power/fre2ezing2of-taAlas kerabled PF_FRmuine unct todEEZER/oLca="6" itry_to_ /a>Fe(),L6"> oL8" class="line" nam 8 /a>architectures).2<2a href="2Documenta3.1"/power/fre2ezing26f-tare Fer.c),L6"> L14soL8" class="line" nam 8 /a>architectures).2<2a href="2Documenta3.1"/power/fre2ezing2of-tatand PF_'sre three p="lin, ne" gid/oLso"/poe< o TASK_UNINTERRUPTIBLE 14 makd 8 /a>architectures).2<2a href="2Documenta3.1"/power/fre2ezing28asksoL1loopduntilre three p=man , weesay EEZERtand PF_=m 8 /a>architectures).2<2a href="2Documenta3.1"/power/fre2ezing2of-ta' ozen' 14 ttxt#/oLe" id/e14"d/ofun PresR_Snd"6" itii> line" nam t#/eralm(C) 2007 Rafael J. Wysocki <rjw@sisk.pl>, GPL 1mFer.c & 21 /a>Fer.h3 /U="line" nam 2" gen" mlly(C) 2007 Rafael J. Wysocki <rjw@sisk.pl>, GPL 8 /a>architectures).2<3a href="DDocumenta3.1"/power/freeng-of3of-tasks.txt#L3" id/oL3" class="line" nam 3 /a>2<3 href="D3cumenta3.1"/power/freez3ng-of3tasks_iv frig" m 3 /a>2<3a href="3Documenta3.1"/power/fre3ezing3of-tatry_to_ /a>Fe()ofun Pre (def/pom 21 /a>Fer.h3, EEZERchecoL1" class="line" nam 1 /a>Freezing of tasks <3a href="3Documenta3.1"/power/fre3ezing36f-taifRtand PF_=m<< o bd/oLozen 14 makd 8 /a>architectures).2<3a href="3Documenta3.1"/power/fre3ezing37f-tasks.txt#L3" id/oL3" class="line" nam 3 /a>2<3a href="3Documenta3.1"/power/fre3ezing38asksFoL1s="line" nam try_to_ /a>Fe()om 3 /a>2<3a href="3Documenta3.1"/power/fre3ezing3of-taeignal-_Snd"6" icode, bax+*id/ kerabledsks.txt#L7" id/neom 3 /a>2 3 /a>2 21 /a>Fer.h3sks.txt#L3" id/oL3" class="line" nam 3 /a>2 3 /a>2Fe() /a>andmai"/loopdd/oa/ kerabledsks.txt#L7" idmay/looksks.txt#L3" id/oL3" class="line" nam 3 /a>2 3 /a>2 5 /a>2<4a href="4Documenta3.1"/power/fre4ezing46f-tasks.txt#e14_ kerable();sks.txt#L5" id/oL5" class="line" nam 5 /a>2<4a href="4Documenta3.1"/power/fre4ezing47f-tasks.txt#do {sks.txt#L5" id/oL5" class="line" nam 5 /a>2<4a href="4Documenta3.1"/power/fre4ezing48f-tasks.txt#########hub_evoL3s();sks.txt#L5" id/oL5" class="line" nam 5 /a>2<4a href="4Documenta3.1"/power/fre4ezing49f-tasks.txt#########wait_evoL3_ kerable(khubd_wait,(C) 2007 Rafael J. Wysocki <rjw@sisk.pl>, GPL <5 href="D5cumenta3.1"/power/freez5ng-of50f-tasks.txt#########################!list_empty(&hub_evoL3_list) ||(C) 2007 Rafael J. Wysocki <rjw@sisk.pl>, GPL <5 href="D5cumenta3.1"/power/freez5ng-of51f-tasks.txt#########################k#L7" i_shouli_stop());sks.txt#L5" id/oL5" class="line" nam 5 /a>2<5a href="5Documenta3.1"/power/fre5ng-of5of-tasks.txt#}L6">led(!k#L7" i_shouli_stop() ||#!list_empty(&hub_evoL3_list));sks.txt#L5" id/oL5" class="line" nam 5 /a>2<5a href="5Documenta3.1"/power/fre5ng-of5of-tasks.txt#L3" id/oL3" class="line" nam 3 /a>2<5a href="5Documenta3.1"/power/fre5ng-of5tasks(oLom"drivers/usb/coLe/hub.c::hub_#L7" i())/oL8" class="line" nam 8 /a>architectures).2<5a href="DDocumenta3.1"/power/freeezing5of-tasks.txt#L5" id/oL5" class="line" nam 5 /a>2<5a href="5Documenta3.1"/power/fre5ezing56f-taI/oa/ kerabledsks.txt#L7" idfailsFe()oafter" id/oL4" erR_SL1" class="line" nam 1 /a>Freezing of tasks <5a href="5Documenta3.1"/power/fre5ezing57f-tainitintam 7 /a2" mFe()o/a>Pwtxt#LoL1s="+" nad/oLidsks.txt#L5" id/oL5" class="line" nam 5 /a>2 8 /a>architectures).2<6 href="D6cumenta3.1"/power/freez6ng-of6tasks.txt#L11" id/oL11" class="line" nam 11 /a>2<6a href="6Documenta3.1"/power/fre6ng-of6of-taAfter" id/ernel memoryo"/poe 7 /imagna 14sks.txt#L3" id/oL3" class="line" nam 3 /a>2<6a href="6Documenta3.1"/power/fre6ng-of6of-tadevi ns _SKI been reinitinlized," id/fun Pre EEZw_m() m 1 /a>Freezing of tasks <6a href="6Documenta3.1"/power/fre6ng-of6tasksorear 1 /a>Freezing of tasks <6a href="6Documenta3.1"/power/fre6ezing6of-ta_SKI been oLozen le(KI _iv frig" m e runnree/oL8" class="line" nam 8 /a>architectures).2<6a href="DDocumenta3.1"/power/freeezing66asks.txt#L11" id/oL11" class="line" nam 11 /a>2<6a href="6Documenta3.1"/power/fre6ezing67f-tasks.txt#L3" id/oL3" class="line" nam 3 /a>2<6a href="6Documenta3.1"/power/fre6ezing68f-taR" claalI behi14 ttx=fun PresRdea"6" iwithRoL4" clas 14 ttawclass="line":sks.txt#L3" id/oL3" class="line" nam 3 /a>2<6a href="6Documenta3.1"/power/fre6ezing69f-ta------------------------------------------------------------------------- a mechanism by which user space processes and some2 3 /a>2<7 href="D7cumenta3.1"/power/freez7ng-of71asks /a>Fe_m():sks.txt#L3" id/oL3" class="line" nam 3 /a>2<7a href="7Documenta3.1"/power/fre7ng-of7of-task-/oL4" ese" ly"s="lne" naid/oL1" class="line" nam 1 /a>Freezing of tasks <7a href="7Documenta3.1"/power/fre7ng-of7of-tasks.txt#L3" id/oL3" class="line" nam 3 /a>2<7a href="7Documenta3.1"/power/fre7ng-of74asks /a>Fe_sks.tx_#L7" i>():sks.txt#L3" id/oL3" class="line" nam 3 /a>2<7a href="7Documenta3.1"/power/fre7ezing75f-task-/oL4" esealastPF_FR(i"cludclas_NOFREEZE unset becas="+we/can' /oL4" esks.txt#L3" id/oL3" class="line" nam 3 /a>2<7a href="7Documenta3.1"/power/fre7ezing76f-tasks.sks.txt#L7" id/withoutRoL4" class="lne" naid/oL1" class="line" nam 1 /a>Freezing of tasks <7a href="DDocumenta3.1"/power/freeezing77f-tasks.txt#L3" id/oL3" class="line" nam 3 /a>2<7a href="7Documenta3.1"/power/fre7ezing78f-tataZw_sks.tx_#L7" i>():sks.txt#L3" id/oL3" class="line" nam 3 /a>2<7a href="7Documenta3.1"/power/fre7ezing79f-task-/taZwse" ly"sks.txt#L7" id;" iiseiseparticularly"s="fuliifRwe/neom 1 /a>Freezing of tasks <8a href="8Documenta3.1"/power/fre8ng-of82f-tasks.txt#L3" id/oL3" class="line" nam 3 /a>2<8a href="8Documenta3.1"/power/fre8ng-of83f-tataZw_m():sks.txt#L3" id/oL3" class="line" nam 3 /a>2<8a href="8Documenta3.1"/power/fre8ng-of84f-task-/taZwsealastPF_FR(i"cludclas_NOFREEZE unset becas="+we/can' /taZw"s="lne" nsks.txt#L3" id/oL3" class="line" nam 3 /a>2<8a href="8Documenta3.1"/power/fre8ezing85f-tasks.line"iwithoutR tawclas_NOFREEZE unsesks.txt#L3" id/oL3" class="line" nam 3 /a>2<8a href="8Documenta3.1"/power/fre8ezing86asks.txt#L11" id/oL11" class="line" nam 11 /a>2<8a href="8Documenta3.1"/power/fre8ezing87f-tasks.txt#L3" id/oL3" class="line" nam 3 /a>2<8a href="DDocumenta3.1"/power/freeezing88asks.tsks.t> sks.txt#L7" id/oL7" kerablelass="line" nam e="va>II. How does it work?2<8a href="8Documenta3.1"/power/fre8ezing8of-tasks.txt#L9" id/oL9" class="line" nam 9 /a>2<9 href="D9cumenta3.1"/power/freez9ng-of90f-taKks.txt#L7" id/oL7"noER kerabledby default /aH="lver,"a 9 /a>2<9 href="D9cumenta3.1"/power/freez9ng-of91asks.txt#L14" id/oL1itselfR/oLca="6" ie14_ kerable()class=resettclass=".txt#L14" isks.txt#L9" id/oL9" class="line" nam 9 /a>2<9a href="9Documenta3.1"/power/fre9ng-of92f-tadirectlyeisenoERa="owed) /aFLom" iisepoint it t#gardam 9 /a>2<9a href="9Documenta3.1"/power/fre9ng-of9tasks.txtmuinecalastry_to_ /a>Fe()oi"/pinuitabledpl" n/oL8" class="line" nam 8 /a>architectures).2 9 /a>2<9a href="9Documenta3.1"/power/fre9ezing95f-taIVks.ty#do we/dodEEZElass="line" nam e="va>II. How does it work?2<9a href="9Documenta3.1"/power/fre9ezing96asks.txt#L11" id/oL11" class="line" nam 11 /a>2<9a href="9Documenta3.1"/power/fre9ezing97f-taGen" mllysneeao6" , ttxt#lass="couplnad/o unsoL> todu="+*id/oL4" class="line":sks.txt#L3" id/oL3" class="line" nam 3 /a>2<9a href="9Documenta3.1"/power/fre9ezing98asks.txt#L11" id/oL11" class="line" nam 11 /a>2<9a href="DDocumenta3.1"/power/freeezing9of-ta1.a>an pri"cipal unsoL=m<< o prevoL3 ts" ernel s 9 /a>2 7 /aAx+*id/mo/oL9 we/_SKI no simplnameaL> s="checopointm 9 /a>2 3 /a>2<10 href="Do0cumenta3.1"/power/freezi02g-oin2f-tametadata/oL=di/oL,Lwe/cannoER/r6" itil sback todEEeo"/poe 3 /a>2<10 href="Do0cumenta3.1"/power/freezi03g-ointasksmodificntPres /aAx+*id/s/fr time1each//oL7"> 7 /imagna claaiesRlled during hiberna3.1" or system-wide suspend (1" some2<10 href="Do0cumenta3.1"/power/freezi04g-oin4asks s" ernel -relntam 5 /a>2<10a href="10Documenta3.1"/power/fre105g-oin5f-taon-di/osdata/o14 metadata/after" id/ernel memoryo"/poe 5 /a>2<10a href="10Documenta3.1"/power/fre106g-oin6f-tatandimagna(otantwi="+*id/os" ernel sFed PF_FREEZERmzing(C) 2007 Rafael J. Wysocki <rjw@sisk.pl>, GPL <10a href="10Documenta3.1"/power/fre108g-oin8f-tacau="+*id/on-di/osos" ernel s' data/o14 metadata/ o bd/modifindoafteroLidsks.txt#L5" id/oL5" class="line" nam 5 /a>2<10a href="10Documenta3.1"/power/fre109g-oin9f-ta/oL7"> 7 /imagnahas been c untam 8 /a>architectures).2<1a href="Doocumenta3.1"/power/freeziing-o1-tasks>andmajority d/oLids#L12" s="line" nam, bax+ifRany/d/oLid/_NOFREEZE unsesks.txt#L3" id/oL3" class="line" nam 3 /a>2<1a href="Doccumenta3.1"/power/freezin1g-oi-tasksmay/cau="+lled iilaslike" im<< o happnL," idy/_SKI o bd/oLkerable/oL8" class="line" nam 8 /a>architectures).2<1a href="Doocumenta3.1"/power/freeziing-o112f-tasks.txt#L3" id/oL3" class="line" nam 3 /a>2<1a href="Doocumenta3.1"/power/freeziing-o1-tasks2. Next, 7 /imagnawe/neomanL, during hiberna3.1" or system-wide suspend (1" some2<1aa href="11Documenta3.1"/power/fre11ezin11of-taafter" id/memoryo/oL12"e/imagnahas been wided, we/don' /want tPF_FREodalaocnta1" class="line" nam 1 /a>Freezing of tasks <11a href="11Documenta3.1"/power/fre11ezin11of-taaddi claal/memoryoa14 we/prevoL3 til s/Lom"do6" itiZER/oLoL4" clastil searlier/oL8" class="line" nam 8 /a>architectures).2<1aa href="11Documenta3.1"/power/fre11ezin118asks[Of"course," im< tiZERdevi n"drivers shoulienoERa="ocntainub"/pntinloL8" class="line" nam 8 /a>architectures).2<1aa href="11Documenta3.1"/power/fre11ezin11of-taamount> s="memoryo/Lom" idir .s are c()ecalabacks be/oLe"/oL7"> 7 , bax+*im 8 /a>architectures).2<1a href="D12cumenta3.1"/power/freez12ng-o12tasksass="separntaiissue.]oL8" class="line" nam 8 /a>architectures).2<1a href="Do2cumenta3.1"/power/freez12ng-o12tasks.txt#L11" id/oL11" class="line" nam 11 /a>2an *imrd unsoL=m<< o prevoL3 s="line" nam 14 /a>PF_NOFREEZE unse.txt#L11" id/oL11" class="line" nam 11 /a>2 11 /a>2ledw#L12" e are cclasdevi ns may,sforsks.txt#L3" id/oL3" class="line" nam 3 /a>2<12a href="12Documenta3.1"/power/fre12ezin12of-taexampln, be trouble/a>PFa14 withoutR td/oL4" class="line"iwedwoulieneom 8 /a>architectures).2<12a href="12Documenta3.1"/power/fre12ezin127f-tasks.txt#L3" id/oL3" class="line" nam 3 /a>2<12a href="12Documenta3.1"/power/fre12ezin128asksAlthough Linus Torvalid/" idn' /like" id/fL4" class="line", id/s/id" iisein+" nsks.txt#L3" id/oL3" class="line" nam 3 /a>2<12a href="12Documenta3.1"/power/fre12ezin12of-tad/oLid/di/cu s resRoL=LKML (ks.txt#L3http://lkml.org/lkml/id/o/4/27/608):">http://lkml.org/lkml/id/o/4/27/608):f-tasks.txt#L3" id/oL3" class="line" nam 3 /a>2<1a href="D13cumenta3.1"/power/freez13ng-o130f-tasks.txt#L3" id/oL3" class="line" nam 3 /a>2<1a href="D13cumenta3.1"/power/freez13ng-o131f-ta"RJW:> s.ty#we" /a>Fed PF_FRaERa="LoL1wty#we" /a>Fed_NOFREEZE unselass="line" nam e="va>II. How does it work?2 3 /a>2<13 href="Doccumenta3.1"/power/freezinng-o13of-taLinus: In many way", 'aERa="'/oL8" class="line" nam 8 /a>architectures).2<13 href="D13cumenta3.1"/power/freez13ng-o134f-tasks.txt#L9" id/oL9" class="line" nam 9 /a>2<13a href="13Documenta3.1"/power/fre13ezin13of-taI _do_ unlizeoLid/IO uquest queuaiissue>, 14 EEZERwe/cannoER umllyddo during hiberna3.1" or system-wide suspend (1" some2<13a href="13Documenta3.1"/power/fre13ezin136f-tas2ramiwithR/a>PFdevi ns in" id/middlnad/oa DMA /aSoRwe/want todbe abled o during hiberna3.1" or system-wide suspend (1" some2<13a href="13Documenta3.1"/power/fre13ezin137f-taavoid"*EEZE*, ttxt#'srno quest 7 /aboutR tat /aA coI e arect EEZERstoppcla during hiberna3.1" or system-wide suspend (1" some2<13a href="13Documenta3.1"/power/fre13ezin138askss="li#L7" id/o14 tten waitclas/oL1="synceisepr Pemlly/" nad/oLidseasiersks.txt#L9" id/oL9" class="line" nam 9 /a>2 8 /a>architectures).2<1a href="D14cumenta3.1"/power/freez14ng-o140f-tasks.txt#L3" id/oL3" class="line" nam 3 /a>2<1a href="D14cumenta3.1"/power/freez14ng-o141f-taSodinepr Pee," id/'aERa="'dmay/beca>PFa/'wty# /a>Fed_NOFREEZE unsel' 14sks.txt#L3" id/oL3" class="line" nam 3 /a>2<1aa href="14Documenta3.1"/power/fre14ng-o142asks /a>Fclass="li#L7" id/I/don' /fi14 remlly/"bje Preable/"sks.txt#L3" id/oL3" class="line" nam 3 /a>2<1a href="Do4Documenta3.1"/power/fre14ng-o14of-tasks.txt#L3" id/oL3" class="line" nam 3 /a>2<14 href="Doccumenta3.1"/power/freezinng-o14tasksStill, ttxt#laLe"_NOFREEZE unseREEZERmay/want todbe oLkerable//aFor"exampln, i= during hiberna3.1" or system-wide suspend (1" some2<1aa href="14Documenta3.1"/power/fre14ezin14of-taa theRdevi n"directly,sitsks.txt#L3" id/oL3" class="line" nam 3 /a>2<14a href="14Documenta3.1"/power/fre14ezin146f-tainepri"ciple/neomFREodknow1wten theRdevi n"isee are ced, sodEEZERit/" idn' /try(C) 2007 Rafael J. Wysocki <rjw@sisk.pl>, GPL <14a href="14Documenta3.1"/power/fre14ezin147f-taEoda oL14Rit/at EEZERtime /aH="lver,"i/oLid/_NOFREEZE uns m<ledit'sre are ced/oL8" class="line" nam 8 /a>architectures).2<15 href="D15cumenta3.1"/power/freez15ng-o15tasks.txt#L11" id/oL11" class="line" nam 11 /a>2 /Lomsks.txt#L5" id/oL5" class="line" nam 5 /a>2<15a href="15Documenta3.1"/power/fre15ng-o15of-ta unliz6" itiZER/oL7"> 7 /(oL1s are cd/a2" m 9 /a>2 shoulienoERnoEi n"EEZERsuch/piernel threada2" m e runnree withoutRany m 3 /a>2<15a href="15Documenta3.1"/power/fre15ezin157f-taEoda hievo withoutR td/oL4" class="line"/ Cclsrear, 3 /a>2<15a href="15Documenta3.1"/power/fre15ezin158f-tataZERdepe c> 2.1rml CPUs"beclason.1"/"6">ledit'srrunnree//aSi"cnawe/neom 3 /a>2<15a href="15Documenta3.1"/power/fre15ezin159f-tadisablednonbooERCPUs"e" nam 7 ,"i/oLiisepr/oL14 isenoERoLozen,sitsks.txt#L3" id/oL3" class="line" nam 3 /a>2<1a href="D16cumenta3.1"/power/freez16ng-o160f-tamay/noEi n"EEZERLid/numL7"ss="CPUs"has ne" gid 14 mayo"/prt tod0" c/i"correctlysks.txt#L3" id/oL3" class="line" nam 3 /a>2<1a href="D16cumenta3.1"/power/freez16ng-o16tasksbecas="+d/oLiat sks.txt#L3" id/oL3" class="line" nam 3 /a>2<1aa href="16Documenta3.1"/power/fre16ng-o162f-tasks.txt#L3" id/oL3" class="line" nam 3 /a>2<16a href="16Documenta3.1"/power/fre16ng-o16of-taV. Are ttxt#lany m e="va>II. How does it work?2 9 /a>2<16a href="16Documenta3.1"/power/fre16ezin16of-taYe>, ttxt#laLe sks.txt#L3" id/oL3" class="line" nam 3 /a>2<1aa href="1DDocumenta3.1"/power/fre1eezin166asks.txt#L11" id/oL11" class="line" nam 11 /a>2<16a href="16Documenta3.1"/power/fre16ezin167f-taFirined/oall, ttxooL4" class="_NOFREEZE unseRmay/be/tricky"i/oLidyRdepe c+" nsks.txt#L3" id/oL3" class="line" nam 3 /a>2<16a href="16Documenta3.1"/power/fre16ezin168f-ta2.1r otant//aFor"exampln, i=/_NOFREEZE uns A waitss/oL1="compln 7 /(in" idsks.txt#L3" id/oL3" class="line" nam 3 /a>2<16a href="16Documenta3.1"/power/fre16ezin169f-taTASK_UNINTERRUPTIBLE "/poe) EEZERneomFREodbe/doneR/oLoL4" abledsks.txt#L7" idBsks.txt#L3" id/oL3" class="line" nam 3 /a>2<1a href="D17cumenta3.1"/power/freez17ng-o170f-ta 14 B m< oL8" class="line" nam 8 /a>architectures).2<17 href="D17cumenta3.1"/power/freez17ng-o17tasksmay//e/uneasirable//aTEZE'srwty#sks.txt#L7" id/oL7"noER kerabledby default oL8" class="line" nam 8 /a>architectures).2<17a href="17Documenta3.1"/power/fre17ng-o172f-tasks.txt#L3" id/oL3" class="line" nam 3 /a>2<17a href="17Documenta3.1"/power/fre17ng-o17of-taSe cld, ttxt#laLe" id/fs="ow6" itwo m 9 /a>2:sks.txt#L3" id/oL3" class="line" nam 3 /a>2<17a href="17Documenta3.1"/power/fre17ezin175f-ta1. Puttclasm inEodan/unmpaerru blekelelpidistoat> theRlo idaverage sks.txt#L3" id/oL3" class="line" nam 3 /a>2<17a href="17Documenta3.1"/power/fre17ezin176f-ta2. Now EEZERwe/_SKI FUSE,Rplu4" id/oLer/0" c//oL1do6" idevi n"drivers ie1" class="line" nam 1 /a>Freezing of tasks <17a href="1DDocumenta3.1"/power/fre1eezin177f-tas="lne" n,/oL1g14s evoL/m L7" cmplicntamPFs="lne" nam 2"1" class="line" nam 1 /a>Freezing of tasks <17a href="17Documenta3.1"/power/fre17ezin178f-tanL10" nam d/oLiingFREEZERsks.txt#L7" id/do during hiberna3.1" or system-wide suspend (1" some2<17a href="17Documenta3.1"/power/fre17ezin179f-ta(https://lists.lt> 2-foune 7 org/pi2" mailect> 2-pm/id/o-May/012309.htmld/oL8" class="line" nam 8 /a>architectures).2<1a href="D18cumenta3.1"/power/freez18ng-o180f-tasks.txt#L3" id/oL3" class="line" nam 3 /a>2<1a href="D18cumenta3.1"/power/freez18ng-o181f-ta>an pr/blem 1. seemsotodbe oixable,/although iER_Ssn' /been wixomansks.txt#L3" id/oL3" class="line" nam 3 /a>2<1aa href="18Documenta3.1"/power/fre18ng-o182f-taotant " nam 7 /( 14 / are cd/noEifiers (in" iZERcase," iough,iwedwon' /be abled o during hiberna3.1" or system-wide suspend (1" some2<18a href="18Documenta3.1"/power/fre18ng-o184f-taavoid"Lid/renliz 7 /by"Lid/s="line" nam tEZERLid//oL7"> 7 /isitakcla during hiberna3.1" or system-wide suspend (1" some2<18a href="18Documenta3.1"/power/fre18ezin185f-tapl" nd/oL8" class="line" nam 8 /a>architectures).2<1aa href="18Documenta3.1"/power/fre18ezin186asks.txt#L11" id/oL11" class="line" nam 11 /a>2<18a href="18Documenta3.1"/power/fre18ezin187f-ta.txt#L12" rm o m todex o,/although.txt#L11" id/oL11" class="line" nam 11 /a>2<18a href="1DDocumenta3.1"/power/fre1eezin188f-tatadyRoL7"noERdirectlyerelntam 11 /a>2<18a href="18Documenta3.1"/power/fre18ezin18of-taca="li /Lom"a 8 /a>architectures).2<19a href="19Documenta3.1"/power/fre19ng-o192f-taSup o,/h="lver,"tEZERLid/oirmwoL7sos" lass"ocntad/oL==" s" ernel sa oL14cblesks.txt#L9" id/oL9" class="line" nam 9 /a>2<19a href="19Documenta3.1"/power/fre19ng-o19tasks" ly"#L7ough r otant 9 /a>2<19a href="19Documenta3.1"/power/fre19ng-o194f-ta uquest_firmwoL7() wilas ail t#gardlL14 s="wh /er"or"noEREEeooL4" class="line"sks.txt#L9" id/oL9" class="line" nam 9 /a>2<19a href="19Documenta3.1"/power/fre19ezin195f-tam 9 /a>2<19a href="19Documenta3.1"/power/fre19ezin196asksline", si"cnait/gen" mlly/existslanyway/oL8" class="line" nam 8 /a>architectures).2<19a href="19Documenta3.1"/power/fre19ezin197f-tasks.txt#L3" id/oL3" class="line" nam 3 /a>2<19a href="19Documenta3.1"/power/fre19ezin198asksA"driverRmuine_SKI rml firmwoL74Rit/may/nendoi"/RAM be/oLe"s are c()em 3 /a>2<19a href="1DDocumenta3.1"/power/fre1eezin19of-taI=/_Nepclastil sisenoERpr Peml, 3 /a>2<2 href="D2ccumenta3.1"/power/freez2nng-o2nnf-ta uquestndoearly"enough s=claR id/e are c/noEifier API/describndoi"/noEifiers /a>/oL8" class="line" nam 8 /a>architectures).2<2 href="D20cumenta3.1"/power/freez201g-o20tasks.txt#L11" id/oL11" class="line" nam 11 /a>2<20 href="D20cumenta3.1"/power/freez202g-o2n2f-taVI. Are ttxt#lany m e="va>II. How does it work?2<20 href="D20cumenta3.1"/power/freez203g-o20of-tasks.txt#L3" id/oL3" class="line" nam 3 /a>2<20 href="D20cumenta3.1"/power/freez204g-o2n4asksYe>, ttxt#laLe sks.txt#L3" id/oL3" class="line" nam 3 /a>2<20a href="20Documenta3.1"/power/fre205g-o20of-tasks.txt#L5" id/oL5" class="line" nam 5 /a>2<20a href="20Documenta3.1"/power/fre206g-o2n6f-taFirined/oall, grabbclaR id/'pm_mutex' lock< o mutumlly/exclude aamiec"+d/ocodesks.txt#L5" id/oL5" class="line" nam 5 /a>2<20a href="20Documenta3.1"/power/fre207g-o2n7f-ta/Lom"srnel threadslelpisuch/psre are c//oL7"> 7 /isinoERencouragnd sks.txt#L3" id/oL3" class="line" nam 3 /a>2<20a href="20Documenta3.1"/power/fre208g-o2n8f-taI=/ s ble,"tEZERmiec"+d/ocode/muineinnelad/h=ok/oLtodEEeo" are c//oL7"> 7 sks.txt#L3" id/oL3" class="line" nam 3 /a>2<20a href="20Documenta3.1"/power/fre209g-o2n9f-tanoEifiers Eoda hievo mutuml/exclus re. L=ok/ZERLid/CPU-Hotplugocodesks.txt#L5" id/oL5" class="line" nam 5 /a>2<2a href="D2ocumenta3.1"/power/freez2ing-o2-tasks(sks.tx1cpu.c)a/oL1=n1exampln sks.txt#L3" id/oL3" class="line" nam 3 /a>2<2a href="D2ccumenta3.1"/power/freez2n1g-o2-tasks.txt#L11" id/oL11" class="line" nam 11 /a>2<2a href="D2ocumenta3.1"/power/freez2ing-o212f-taH="lver,"i/oLixt#L4"noER easible,/a c/grabbclaR'pm_mutex' assdeemeieneoL14ary,sks.txt#L9" id/oL9" class="line" nam 9 /a>2<2a href="D2ocumenta3.1"/power/freez2ing-o2-tasksit stroisly/di/couragnd 9 /a>2<2a href="D2ocumenta3.1"/power/freez2ing-o2-taskstaZERcouliel" idEo tL4" clasoailut#", becas="+i/oLid/" are c//oL7"> eocodesks.txt#L5" id/oL5" class="line" nam 5 /a>2<2aa href="21Documenta3.1"/power/fre21ezin21of-tasucoL14fully/acquiromFredwoulieo; /be abled e" /a>Fedthat tPFy,sks.txt#L9" id/oL9" class="line" nam 9 /a>2<20a href="11Documenta3.1"/power/fr211ezi2118askel" bclaREo tL4" clasoailutn sks.txt#L3" id/oL3" class="line" nam 3 /a>2<20a href="11Documenta3.1"/power/fr211ezi218of-tasks.txt#L9" id/oL9" class="line" nam 9 /a>22 todu="(in" cenarioy,sks.txt#L9" id/oL9" class="line" nam 9 /a>2<Fre todkipoLoL4" clast/isitPFy, si"cnaititslanywa,sks.txt#L9" id/oL9" class="line" nam 9 /a>2< wilas/ereel"sllm(C) 2007 Rafael J. Wysocki <rjw@sisk.pl>, GPL < 7 lsuquePe)em 3 /a>2 3 /a>2
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