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Linux READFILE System Call Revived Now That It Might Have A User

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Linux

Earlier this year we mentioned Greg Kroah-Hartman working on a new READFILE system call. The goal of this new syscall is for reading small and medium files more efficiently by having one call to read a file straight into a buffer without having to use the separate open/read/close system calls. It's looking like that system call is back on the table and could be mainlined now that there's a possible user.

The READFILE system call is simple for reading lightweight files straight into a buffer without the overhead of multiple system calls that in turn can help performance, especially if reading many files such as on sysfs/debugfs and the like.

It had been a number of months without any updates on that syscall and it wasn't mainlined in the cycles since it was proposed earlier this year. But now it looks like it's back on the table.

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