There are two types of function calls , blocking and non blocking , blocking --in whihc we might sleep for some processing , Non blocking -- we will prefer to return from function instead of sleeping Now
write function comes under first category -- and we will sleep till data is written to target block device. Nidhi On Tue, Jun 29, 2010 at 8:30 PM, Sudheer <inbox1.sudh...@gmail.com> wrote: > One basic doubt regarding block layer & write system call. When a > process writes to a file in blocking mode, when the 'write' system > call returns, > > A. will the process be returned only after actually writing the data > on to the target block device? In this case we will get the benefit of > elevator only if multiple processes are writing to the adjacent > locations in the device. Is this true? > > > OR > > B. will the process be returned after scheduling the writing (say > after passing the data to the elevator)? If this case is true, how > would the process ensure that the data has been actually written on to > the block device? > > > > -- > Thanks > Sudheer > > -- > To unsubscribe from this list: send an email with > "unsubscribe kernelnewbies" to ecar...@nl.linux.org > Please read the FAQ at http://kernelnewbies.org/FAQ > > -- Thanks & Regards Nidhi Mittal Hada Scientific officer D Computer Division Bhabha Atomic Research Center Mumbai http://nidhi-searchingmyself.blogspot.com/ -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecar...@nl.linux.org Please read the FAQ at http://kernelnewbies.org/FAQ
