From 4125bf761cd0786e1163e024c7c809ce2cc625bc Mon Sep 17 00:00:00 2001 From: Chris Mason Date: Wed, 3 Feb 2010 18:18:45 +0000 Subject: [PATCH] Btrfs: finish read pages in the order they are submitted The endio is done at reverse order of bio vectors. That means for a sequential read, the page first submitted will finish last in a bio. Considering we will do checksum (making cache hot) for every page, this does introduce delay (and chance to squeeze cache used soon) for pages submitted at the begining. I don't observe obvious performance difference with below patch at my simple test, but seems more natural to finish read in the order they are submitted. Signed-off-by: Shaohua Li Signed-off-by: Chris Mason --- Reading git-format-patch failed