deadlock prevention in os | deadlock prevention in operating system

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Deadlock Prevention
If we simulate deadlock with a table which is standing on its four legs then we can also simulate four legs with the four conditions which when occurs simultaneously, cause the deadlock.
However, if we break one of the legs of the table then the table will fall definitely. The same happens with deadlock, if we can be able to violate one of the four necessary conditions and don't let them occur together then we can prevent the deadlock.
Let's see how we can prevent each of the conditions.
1. Mutual Exclusion
Mutual section from the resource point of view is the fact that a resource can never be used by more than one process simultaneously which is fair enough but that is the main reason behind the deadlock. If a resource could have been used by more than one process at the same time then the process would have never been waiting for any resource.
However, if we can be able to violate resources behaving in the mutually exclusive manner then the deadlock can be prevented.
2. Hold and Wait
Hold and wait condition lies when a process holds a resource and waiting for some other resource to complete its task. Deadlock occurs because there can be more than one process which are holding one resource and waiting for other in the cyclic order.
However, we have to find out some mechanism by which a process either doesn't hold any resource or doesn't wait. That means, a process must be assigned all the necessary resources before the execution starts. A process must not wait for any resource once the execution has been started.
3. No Preemption
Deadlock arises due to the fact that a process can't be stopped once it starts. However, if we take the resource away from the process which is causing deadlock then we can prevent deadlock.
This is not a good approach at all since if we take a resource away which is being used by the process then all the work which it has done till now can become inconsistent.
Consider a printer is being used by any process. If we take the printer away from that process and assign it to some other process then all the data which has been printed can become inconsistent and ineffective and also the fact that the process can't start printing again from where it has left which causes performance inefficiency.
4. Circular Wait
To violate circular wait, we can assign a priority number to each of the resource. A process can't request for a lesser priority resource. This ensures that not a single process can request a resource which is being utilized by some other process and no cycle will be formed.

[@kirthikakamalesh8793]

You are doing this great sir.Concepts are all understanding.Please continue this only in English and not in other languages, because all may not knew hindi including me.Take lectures in English kindly ❤️

[@SudhakarAtchala]

Thank you, I will Kamalesh. Plz subscribe to the channel and if possible share with your friends. Thanks

[@PushpalathaBadagala]

Sir explaination is really outstanding and I am listening his videos from my 2-1 thankyou very much sir for your contributions for us

[@SudhakarAtchala]

Thanks and welcome. Plz subscribe to the channel and if possible share with your friends. Thanks in advance..

[@PushpalathaBadagala]

Already subscribed sir

[@vasavishala2299]

Sir iam thank full to u by watching your videos I can attempt most of the question sir

[@SudhakarAtchala]

All the best vishala. Plz subscribe to the channel and if possible share with your friends. Thanks in advance.

[@lakshmimadhanmohansriramse4258]

Thank you for giving this video and explanation is very well sir

[@SudhakarAtchala]

So nice of you mohan. Plz subscribe to the channel and if possible share with your friends. Thanks

[@anandspark1651]

Tq very much sir this is very helpful for me

[@SudhakarAtchala]

Most welcome Anand. Plz subscribe to the channel and if possible share with your friends. Thanks in advance.

[@radhareddy7716]

Excellent explanation sir.thanks sir

[@SudhakarAtchala]

Welcome. Plz subscribe to the channel and if possible share with your friends. Thanks in advance.

[@peravalirishe4242]

Sir you are amazing i subscribed to you sir and i shared to my friends

[@SudhakarAtchala]

Many many thanks

[@kavyachoragudi885]

Excellent explanation sir.

[@SudhakarAtchala]

Thanks and welcome kavya. plz subscribe to the channel and if possible share with your friends. Thanks

[@meherchaitanyavanacharla2241]

Nice explanation, at understandable mode of language, pls do these kind of videos, more. SPECTACULAR

[@SudhakarAtchala]

Hai Vijayasree, plz go through my videos once. Definitely you will like more videos. Thanks for your encouragement and support towards our channel. Share my sessions with your friends and subscribe to our channel.Keep on following my sessions. Thank you so much.

[@tummarekha8583]

@@SudhakarAtchala uml unda mee deggara

[@tummarekha8583]

@@SudhakarAtchala can u plz send uml vedios and notes sir

[@SudhakarAtchala]

@@tummarekha8583 ledu

[@SudhakarAtchala]

@@tummarekha8583 levu.

[@abhinavksp4155]

sir meeru devudu sir🙏

[@SudhakarAtchala]

So nice of you.

[@pavani1275]

Nice video I pass my exam because of u sir

[@SudhakarAtchala]

Congrats Pavani. Plz subscribe to the channel and if possible share with your friends. Thanks in advance.

[@neerajkumarreddysuravaram438]

thank you

[@SudhakarAtchala]

You're welcome Neeraj. Plz subscribe to the channel and if possible share with your friends. Thanks

[@ukeditz3]

thank you sir

[@SudhakarAtchala]

So nice of you. Plz subscribe to the channel and if possible share with your friends. Thanks in advance..

[@mastermonvamsimon4510]

Very good explanation sir

[@SudhakarAtchala]

Thanks and welcome. Plz subscribe to the channel and if possible share with your friends. Thanks in advance...

[@ayeshasiddiqua1821]

Ur rocking sir

[@SudhakarAtchala]

Thanks. Plz subscribe to the channel and if possible share with your friends. Thanks in advance.

[@vasavilakshmipalavalasa4032]

Good explanation ❤️

[@SudhakarAtchala]

Thank you 🙂 Plz subscribe to the channel and if possible share with your friends. Thanks in advance..

[@sunnyreddy5780]

Nice sir✨

[@SudhakarAtchala]

Hai Sunny Reddy, plz go through my playlists once. Definitely you will like more videos. Thanks for your encouragement and support towards our channel.Share my sessions with your friends and subscribe to our channel.Keep on following my sessions. Thank you so much.

[@noahmaxi934]

awesome

[@SudhakarAtchala]

Hai Noah 217, plz go through my playlists once. Definitely you will like more videos. Thanks for your encouragement and support towards our channel.Share my sessions with your friends and subscribe to our channel.Keep on following my sessions. Thank you so much.

[@saianil1688]

good !

[@SudhakarAtchala]

Hai Anil , plz go through my videos once. Definitely you will like more videos. Thanks for your encouragement and support towards our channel. Share my sessions with your friends and subscribe to our channel.Keep on following my sessions. Thank you so much.

[@mrunknown1211]

Niceeee

[@SudhakarAtchala]

Thanks. Plz subscribe to the channel and if possible share with your friends. Thanks in advance.

[@user-sg2po4bt6w]

You are teaching is under standable

[@SudhakarAtchala]

Thanks. Plz subscribe to the channel and if possible share with your friends. Thanks in advance..

[@charithakuntamukkala1933]

In this video you draw same diagram for both hold and wait and circular wait is it ok sir

[@SudhakarAtchala]

Both are related. yes ok. Plz subscribe to the channel and if possible share with your friends. Thanks in advance...

[@middollasreelatha3225]

is there any have banker algorithm for deadlock prevention

[@SudhakarAtchala]

No. Plz subscribe to the channel and if possible share with your friends. Thanks in advance..

[@freethinkers3680]

sir also make this video in hindi language

[@SudhakarAtchala]

K

[@SudhakarAtchala]

Hai , plz go through my videos once. Definitely you will like more videos. Thanks for your encouragement and support towards our channel. Share my sessions with your friends and subscribe to our channel.Keep on following my sessions. Thank you so much.