lkml.org 
[lkml]   [2012]   [Dec]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[PATCH] dm-crypt: never use write same (was Re: [v3.7 Regression] [SCSI] sd: Implement support for WRITE SAME)
Does this help?

dm-crypt: never use write same

Ciphertext device is not compatible with WRITE SAME,
disable it for all dmcrypt devices.

Signed-off-by: Milan Broz <mbroz@redhat.com>

--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -1844,6 +1844,12 @@ static int crypt_iterate_devices(struct dm_target *ti,
return fn(ti, cc->dev, cc->start, ti->len, data);
}

+static void crypt_io_hints(struct dm_target *ti,
+ struct queue_limits *limits)
+{
+ limits->max_write_same_sectors = 0;
+}
+
static struct target_type crypt_target = {
.name = "crypt",
.version = {1, 11, 0},
@@ -1858,6 +1864,7 @@ static struct target_type crypt_target = {
.message = crypt_message,
.merge = crypt_merge,
.iterate_devices = crypt_iterate_devices,
+ .io_hints = crypt_io_hints,
};

static int __init dm_crypt_init(void)


\
 
 \ /
  Last update: 2012-12-19 22:21    [W:0.085 / U:1.340 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site