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.TH "BLK_QUEUE_BOUNCE_LIMIT" "" "06 October 2005" "" ""

.SH NAME
blk_queue_bounce_limit \- set bounce buffer limit for queue
.SH SYNOPSIS
"SYNOPSIS"
.sp
\fB
.sp
void blk_queue_bounce_limit  (request_queue_t * \fIq\fB, u64 \fIdma_addr\fB);
\fR
.SH "ARGUMENTS"
.TP
\fB\fIq\fB\fR
the request queue for the device
.TP
\fB\fIdma_addr\fB\fR
bus address limit
.SH "DESCRIPTION"
.PP
Different hardware can have different requirements as to what pages
it can do I/O directly to. A low level driver can call
blk_queue_bounce_limit to have lower memory pages allocated as bounce
buffers for doing I/O to pages residing above \fIpage\fR\&. By default
the block layer sets this to the highest numbered ``low'' memory page.