https://bugzilla.kernel.org/show_bug.cgi?id=105121 --- Comment #4 from ValdikSS <iam@xxxxxxxxxxxxxxx> --- Nobody really uses grep on sparse files. It was just a discussion on why many people use cat|grep instead of just using 'grep file', as pipes are usually slower. Somebody said that he uses cat|grep because it's actually faster than 'grep file' and made this test case. fallocate was used just to make big enough file to tell a difference in seconds. His result was 1 second with cat|grep and 3 seconds with grep file, but he was running btrfs. When I tried his test case, it hang grep so hard I couldn't kill it with SIGKILL even if it was in 'running' state. I took a look in strace what's going on and why it is stalled and filled this bug. Anyway, thanks for confirmation and acknowledgment this problem! -- You are receiving this mail because: You are watching the assignee of the bug. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
