Read test용

(버전 사이의 차이)

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@@ 1번째 줄: / 1번째 줄: @@
 <uml>
-partition VFS {
+partition Ext4 {
-"sys_read()" --> "vfs_read()"
+"do_sync_read()" --> "generic_file_aio_read()"
-"vfs_read()" -> "do_sync_read()"
+"generic_file_aio_read()" --> if "!O_DIRECT" then
+--> "do_generic_file_read()"
+endif
+"do_generic_file_read()" --> if "!page" then
+--> "page_cache_sync_readahead()"
+"page_cache_sync_readahead()" --> "ondemand_readahead()"
+"ondemand_readahead()" --> "__do_page_cache_readahead()"
+"__do_page_cache_readahead()" --> "read_pages()"
+"read_pages()" --> "blk_start_plug()"
+endif
+"do_generic_file_read()" --> if "PageReadahead(page)" then
+--> "page_cache_async_readahead()"
+"page_cache_async_readahead()" --> "ondemand_readahead"
+"ondemand_readahead" --> "__do_page_cache_readahead()"
+"__do_page_cache_readahead()" --> "read_pages()"
+"read_pages()" --> "blk_start_plug()"
+endif
+"do_generic_file_read()" --> "ext4_readpages()"
+"ext4_readpages()" -->"mpage_readpages()"
+"mpage_readpages()" --> "mpage_bio_submit()"
 }
 </uml>

2014년 5월 16일 (금) 20:35 판