How do i increase the size of the linux fifo's currently set to 4K in 2.6 kernel ?

ayb · 06-24-2004, 05:51 PM

I have a IPC library using fifos. Currently the size of fifo is limited to 4K.

1) Is there a way to increase this size by simply changing the #define in the kernel for this fifo size and recompiling the kernel ?

2) Would this be a problem on linux 2.6 kernel since its preemptive ?

I can't use shared memory for performance reasons and can't use sockets since it leads to deadlock conditions because of not having a server-client model.

I would appreciate any help/pointers from you folks ?

Thanks.

infamous41md · 06-24-2004, 09:15 PM

the only limits imposed on pipes and FIFOS are the maximum number of open descriptors and the maximum # of bytes that can be written atomically, and then obviously the free space left on the file system that the FIFO file resides on. w/e u may be experiencing has nothing to do with kernel limits.

ayb · 06-25-2004, 07:55 AM

I am sorry. I didn't ask the question properly in the first place.
I am trying to find out if there is a way to change the maximum # of bytes
that can be written atomically. Currently as per my understanding, it
is set to 4K which is a Page Size.

Is there any way to change this constant ?