[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <49400F2F.4050603@vlnb.net>
Date: Wed, 10 Dec 2008 21:49:19 +0300
From: Vladislav Bolkhovitin <vst@...b.net>
To: linux-scsi@...r.kernel.org
CC: James Bottomley <James.Bottomley@...senPartnership.com>,
Andrew Morton <akpm@...ux-foundation.org>,
FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>,
Mike Christie <michaelc@...wisc.edu>,
Jeff Garzik <jeff@...zik.org>,
Boaz Harrosh <bharrosh@...asas.com>,
Linus Torvalds <torvalds@...ux-foundation.org>,
linux-kernel@...r.kernel.org, scst-devel@...ts.sourceforge.net,
Bart Van Assche <bart.vanassche@...il.com>,
"Nicholas A. Bellinger" <nab@...ux-iscsi.org>,
Jens Axboe <jens.axboe@...cle.com>
Subject: [PATCH][RFC 13/23]: Export of alloc_io_context() function
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@...b.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.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists