{"id":6272,"date":"2011-11-26T16:41:38","date_gmt":"2011-11-26T16:41:38","guid":{"rendered":"http:\/\/www.beautifulwork.org\/?p=6272"},"modified":"2011-11-26T16:41:38","modified_gmt":"2011-11-26T16:41:38","slug":"parameter-block_dump","status":"publish","type":"post","link":"https:\/\/www.trueangle.org\/index.php\/2011\/11\/26\/parameter-block_dump\/","title":{"rendered":"block_dump enables block I\/O debugging when set to a nonzero value"},"content":{"rendered":"<pre>\nWhen this flag is set, Linux reports all disk read and write\noperations that take place, and all block dirtyings done to\nfiles. This makes it possible to debug why a disk needs to\nspin up, and to increase battery life even more. The output of\nblock_dump is written to the kernel output, and it can be\nretrieved using \"dmesg\". When you use block_dump and your kernel\nlogging level also includes kernel debugging messages, you\nprobably want to turn off klogd, otherwise the output of block_dump\nwill be logged, causing disk activity that is not normally there.\n\n<\/pre>\n<pre>\n$cat \/proc\/sys\/vm\/block_dump\n0\n$echo 1 &gt; \/proc\/sys\/vm\/block_dump\n$cat \/proc\/sys\/vm\/block_dump\n1\n$\n<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>When this flag is set, Linux reports all disk read and write operations that take place, and all block dirtyings done to files. This makes it possible to debug why a disk needs to spin up, and to increase battery life even more. The output of block_dump is written to the kernel output, and it &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/www.trueangle.org\/index.php\/2011\/11\/26\/parameter-block_dump\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;block_dump enables block I\/O debugging when set to a nonzero value&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[83],"tags":[487],"_links":{"self":[{"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/posts\/6272"}],"collection":[{"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/comments?post=6272"}],"version-history":[{"count":0,"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/posts\/6272\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/media?parent=6272"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/categories?post=6272"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/tags?post=6272"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}