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Date: Sun, 22 Nov 2009 21:18:02 +0900 From: Hiroyasu OHYAMA <ohyama_sec@...el-networks.com> To: linux-kernel@...r.kernel.org Subject: [PATCH] (Documentation) append more detail explanation to the I/O scheduler API. From: Hiroyasu OHYAMA Signed-off-by: Hiroyasu OHYAMA <ohyama_sec@...el-networks.com> I'm sorry, I realized that the patch which I send before is incorrect format to send it to lkml. So I resend it. This patch append more detail explanation to the Documentation of API of I/O scheduler. Thank you for reading. --- diff --git a/Documentation/block/biodoc.txt b/Documentation/block/biodoc.txt index 8d2158a..7c04f54 100644 --- a/Documentation/block/biodoc.txt +++ b/Documentation/block/biodoc.txt @@ -935,7 +935,12 @@ keeping work. 4.1. I/O scheduler API The functions an elevator may implement are: (* are mandatory) -elevator_merge_fn called to query requests for merge with a bio +elevator_merge_fn called to query requests for merge with a bio. This method + have two following works. One is to indicate how to merge request + with bio from head or tail. This function doesn't merge them actually, + but just indicate direction for merging from head or tail, or that + there is no request with that bio can merge. Another work is to get + the request object which is merged, if the bio can do. elevator_merge_req_fn called when two requests get merged. the one which gets merged into the other one will be -- 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/
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