Ошибки в zram

#!/bin/bash
start() {
# get the number of CPUs
num_cpus=$(grep -c processor /proc/cpuinfo)
# if something goes wrong, assume we have 1
[ "$num_cpus" != 0 ] || num_cpus=1
# set decremented number of CPUs
last_cpu=$((num_cpus - 1))
#default Factor % = 90 change this value here or create /etc/default/zram
FACTOR=90
#& put the above single line in /etc/default/zram with the value you want
[ -f /etc/default/zram ] && source /etc/default/zram || true
factor=$FACTOR # percentage
# get the amount of memory in the machine
memtotal=$(grep MemTotal /proc/meminfo | awk ' { print $2 } ')
mem_by_cpu=$(($memtotal/$num_cpus*$factor/100*1024))
if ! modprobe zram zram_num_devices=$num_cpus
then
echo -e "Your Kernel needs to be compiled with ZRAM support:" \
"\n\nDevice Drivers --> Staging Drivers --> Compressed RAM block device support (M)" \
"\nDevice Drivers --> Staging Drivers --> Dynamic compression of swap pages and clean pagecache pages (*)" \
"\n\nThe Liquorix Kernel (http://liquorix.net) has ZRAM support built in."
exit 1
fi
echo "zram devices probed successfully"
# initialize the devices
for i in $(seq 0 $last_cpu); do
echo $mem_by_cpu > /sys/block/zram$i/disksize
# Creating swap filesystems
mkswap /dev/zram$i
# Switch the swaps on
swapon -p 100 /dev/zram$i
done
}
stop() {
# get the number of CPUs
num_cpus=$(grep -c processor /proc/cpuinfo)
# set decremented number of CPUs
last_cpu=$((num_cpus - 1))
# Switching off swap
for i in $(seq 0 $last_cpu); do
if [ "$(grep /dev/zram$i /proc/swaps)" != "" ]; then
swapoff /dev/zram$i
sleep 1
fi
done
sleep 1
rmmod zram
}
case "$1" in
start)
start
;;
stop)
stop
;;
restart)
stop
sleep 3
start
;;
*)
echo "Usage: $0 {start|stop|restart}"
RETVAL=1
esac
exit $RETVAL

commit 94bcc7deb8fed472360ad72ef3717c5409057fca
Author: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Date:   Sat Jun 22 17:21:00 2013 +0300
    zram: allow request end to coincide with disksize
    
    commit 75c7caf5a052ffd8db3312fa7864ee2d142890c4 upstream.
    
    Pass valid_io_request() checks if request end coincides with disksize
    (end equals bound), only fail if we attempt to read beyond the bound.
    
    mkfs.ext2 produces numerous errors:
    [ 2164.632747] quiet_error: 1 callbacks suppressed
    [ 2164.633260] Buffer I/O error on device zram0, logical block 153599
    [ 2164.633265] lost page write due to I/O error on zram0
    
    Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
    Cc: Thomas Backlund <tmb@mageia.org>
    Cc: Minchan Kim <minchan@kernel.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/zram/zram_drv.c b/drivers/staging/zram/zram_drv.c
index 7538774..82c7202 100644
--- a/drivers/staging/zram/zram_drv.c
+++ b/drivers/staging/zram/zram_drv.c
@@ -180,7 +180,7 @@ static inline int valid_io_request(struct zram *zram, struct bio *bio)
end = start + (bio->bi_size >> SECTOR_SHIFT);
bound = zram->disksize >> SECTOR_SHIFT;
/* out of range range */
- if (unlikely(start >= bound || end >= bound || start > end))
+ if (unlikely(start >= bound || end > bound || start > end))
return 0;
/* I/O request is valid */