[rtl] use of RT Fifo leads to IRQ be lost RTL 2.2

[G�rard LASSAILLY]

I'm using 4 RT Fifo under RT Linux 2.2. I write blocs of 1.4 Mbytes in  RT FIFO (1.4 Mbytes by rtf_put() ). This write in RT Fifo is repeat 25 times by second.   During this, IRQ are lost or delayed.   I don't use RT Fifo in ISR but only to communicate between RT task and user task under LINUX.   I think that IRQ are masked during rtf_put() during a long time.   Some knowledge please ? Do you know if RT Linux 3.0 or 3.1 workaround this probleme?   Thanks for your reply.