The commit is pushed to "branch-rh7-3.10.0-514.6.1.vz7.28.x-ovz" and will
appear at https://src.openvz.org/scm/ovz/vzkernel.git
after rh7-3.10.0-514.6.1.vz7.28.7
------>
commit 780346f14210fba056968e6ed743449d4e8ebf68
Author: Dmitry Monakhov <dmonak...@openvz.org>
Date: Mon Feb 27 18:16:06 2017 +0400
ext4: fix seek_data soft lookup on sparse files
Good fix requires optimal implementation of next_extent like it was done in
14516bb ("ext4: fix suboptimal seek_{data,hole} extents traversial") or
2d90c160 ("ext4: more efficient SEEK_DATA implementation"),
but this makes patch huge, let's just break the loop when necessery.
https://jira.sw.ru/browse/PSBM-55818
Signed-off-by: Dmitry Monakhov <dmonak...@openvz.org>
---
fs/ext4/file.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index c63d937..167e262 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -612,7 +612,17 @@ static loff_t ext4_seek_data(struct file *file, loff_t
offset, loff_t maxsize)
if (unwritten)
break;
}
-
+ if (signal_pending(current)) {
+ mutex_unlock(&inode->i_mutex);
+ return -EINTR;
+ }
+ if (need_resched()) {
+ mutex_unlock(&inode->i_mutex);
+ cond_resched();
+ mutex_lock(&inode->i_mutex);
+ isize = inode->i_size;
+ end = isize >> blkbits;
+ }
last++;
dataoff = (loff_t)last << blkbits;
} while (last <= end);
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