[PATCH][RFC 13/23]: Export of alloc_io_context() function

Vladislav Bolkhovitin
2008-12-10T18:50:23Z

This patch exports alloc_io_context() function. For performance reasons
SCST queues commands using a pool of IO threads. It is considerably
better for performance (>30% increase on sequential reads) if threads in
a pool have the same IO context. Since SCST can be built as a module,
it needs alloc_io_context() function exported.

Signed-off-by: Vladislav Bolkhovitin <vst@vlnb.net>
---
block/blk-ioc.c | 1 +
1 file changed, 1 insertion(+)

diff -upkr linux-2.6.27.2/block/blk-ioc.c linux-2.6.27.2/block/blk-ioc.c
--- linux-2.6.27.2/block/blk-ioc.c 2008-10-10 02:13:53.000000000 +0400
+++ linux-2.6.27.2/block/blk-ioc.c 2008-11-25 21:27:01.000000000 +0300
@@ -105,6 +105,7 @@ struct io_context *alloc_io_context(gfp_

return ret;
}
+EXPORT_SYMBOL(alloc_io_context);

/*
* If the current task has no IO context then create one and initialise it.