Deadlocks
SunaphaS e able do sy chsmje.
$st
ece- et Sk pe. 4sk. Resounee; Compact DK Tapes
Reettbee. and Res BUNce :Pen Due
P2 bnauy samaphaes
Wawt (P) ;
Tapes
Each procvs needs both Tapes nd Pen Duis to completi u émeuen
Tris dad do a,diadlock <ituaim
beadlock sthualon : Whsn ovMoCLA uu otha peeoreespoCuAAHlAoUARA. kp.
SumaphoS can Slt in a dladlock sd sitation
PA 2
80k 0ep eok
Go
ThA Ouil-tcautp40
OK Ths isl a deaclok Stuaion
kvun.ha Apwe1a Swopu mun yaaeooadn
cecondaymuo.Tasom ppae najnmme
deadiak
usuiee
coun Scub
preimptall
, P2
P2 canot pint.
Cfo some
wu) Md wu g io block shate
pouisle
cAntnt cwteh i
eout ent cwuth
Non -Premplure RisUNeL i One e allocale the iUnee, we cannot deslocat it
UMlul itaMplat ALAubien.
Fe
on
aL tou aud pu duwe oanple.
BupeCLA ton ukab Cid bed
bath T
cecen au
and P
ou
pak
dd Ma.
h cutiea ceciem
Naik (e); and wait (T); (cswl go do bock state)
(Non du pHou ulenl)
ISDkB eSpae un wan LtwO.
80KB P1
GOKB P2
10KB PA
tLel le take euk dala 6ne pUCA ad ee the H&DMNA
on odal:.
XLee owoilobility
mmoy dns.tas, peuntosele
Hutiple fntances:
P Pn
mtpe atae. P3
a an alaouad
duadlock adion.
, . RaAuk. malocl )
2. Uae
3. Reee Releau (), en,clee
RLquAt
Kexncl is
juwucu
the only ne
codyud
wilh areem do
Jh Kenel .
haudwaedevic.
onct tal tnteutaem is towpdet , tulcaae thl iatuuce
So tun it cen llo cuti tlheteto oothe eem.
Rnel
• male untom: uauating thu eseee
malloc u, er, cce: taAt au tehions
KEULd waintaus a talale .
This talole wos lL data , Wka BuuNAL
heuw raMH- UtaMee , ill HUeuuCl aL MuAt aud wMAat Au stoluuecn
Wouulable,.
uPAUe.
o
1. MutuLal Eveusion : Deadlockcan ly oetu tnl is@ueA dL
euee to one
Pocus.
punta.
Swe to P2)
honpaemtajnesuwee
RsBee Caatiiu
2. Nen-RUmpswe
3. Hald aund Wat: t shsulA conti nue haldng NaBee
4. Cnuar wait
PI
adudlock
Ne can chek
ecu in hu St)
Fo ) weiug ae eoudtto
wat (r);
SunaphaS e able do sy chsmje.
$st
ece- et Sk pe. 4sk. Resounee; Compact DK Tapes
Reettbee. and Res BUNce :Pen Due
P2 bnauy samaphaes
Wawt (P) ;
Tapes
Each procvs needs both Tapes nd Pen Duis to completi u émeuen
Tris dad do a,diadlock <ituaim
beadlock sthualon : Whsn ovMoCLA uu otha peeoreespoCuAAHlAoUARA. kp.
SumaphoS can Slt in a dladlock sd sitation
PA 2
80k 0ep eok
Go
ThA Ouil-tcautp40
OK Ths isl a deaclok Stuaion
kvun.ha Apwe1a Swopu mun yaaeooadn
cecondaymuo.Tasom ppae najnmme
deadiak
usuiee
coun Scub
preimptall
, P2
P2 canot pint.
Cfo some
wu) Md wu g io block shate
pouisle
cAntnt cwteh i
eout ent cwuth
Non -Premplure RisUNeL i One e allocale the iUnee, we cannot deslocat it
UMlul itaMplat ALAubien.
Fe
on
aL tou aud pu duwe oanple.
BupeCLA ton ukab Cid bed
bath T
cecen au
and P
ou
pak
dd Ma.
h cutiea ceciem
Naik (e); and wait (T); (cswl go do bock state)
(Non du pHou ulenl)
ISDkB eSpae un wan LtwO.
80KB P1
GOKB P2
10KB PA
tLel le take euk dala 6ne pUCA ad ee the H&DMNA
on odal:.
XLee owoilobility
mmoy dns.tas, peuntosele
Hutiple fntances:
P Pn
mtpe atae. P3
a an alaouad
duadlock adion.
, . RaAuk. malocl )
2. Uae
3. Reee Releau (), en,clee
RLquAt
Kexncl is
juwucu
the only ne
codyud
wilh areem do
Jh Kenel .
haudwaedevic.
onct tal tnteutaem is towpdet , tulcaae thl iatuuce
So tun it cen llo cuti tlheteto oothe eem.
Rnel
• male untom: uauating thu eseee
malloc u, er, cce: taAt au tehions
KEULd waintaus a talale .
This talole wos lL data , Wka BuuNAL
heuw raMH- UtaMee , ill HUeuuCl aL MuAt aud wMAat Au stoluuecn
Wouulable,.
uPAUe.
o
1. MutuLal Eveusion : Deadlockcan ly oetu tnl is@ueA dL
euee to one
Pocus.
punta.
Swe to P2)
honpaemtajnesuwee
RsBee Caatiiu
2. Nen-RUmpswe
3. Hald aund Wat: t shsulA conti nue haldng NaBee
4. Cnuar wait
PI
adudlock
Ne can chek
ecu in hu St)
Fo ) weiug ae eoudtto
wat (r);
