From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 105121] lseek(SEEK_DATA) hangs for a long time for sparse files
in the page cache
Date: Mon, 28 Sep 2015 14:52:14 +0000
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--- Comment #2 from ValdikSS ---
>Out of curiosity, what was the use case that caused you to notice this?
A person was wondering why cat|grep works faster than grep file on usual files
and his test case involved creating file with fallocate and cat it before
grepping. He was apparently used btrfs and had 2 seconds difference while it
hang for me as grep does literally what's in the attached source.
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