Kernel Space linux-fsdevel@vger.kernel.org : Currently write(2) to a file is not interruptible by any signal. Sometimes this is desirable, e.g. when you want to quickly kill a process hogging your disk. Also, with commit 499d05ecf990 (“mm: Make task in balance_dirty_pages() killable”), it’s necessary to abort the current write accordingly to avoid it quickly dirtying lots …
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