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zram-swap: enable swap discard

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Zram block devices have supported trim/discard for over six years, let's
enable it. This allows the zram device to actually free up allocated memory
when it's marked as unused in the filesystem metadata, as explained in more
detail in the original commit message [1].

[1] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/drivers/block/zram/zram_drv.c?h=linux-4.14.y&id=f4659d8e620d08bd1a84a8aec5d2f5294a242764

Signed-off-by: Rui Salvaterra <rsalvaterra@gmail.com>
This commit is contained in:
Rui Salvaterra 2020-06-23 12:29:54 +01:00 committed by Petr Štetiar
parent c5c652e5ad
commit 0bd7dfa3ed
1 changed files with 1 additions and 1 deletions
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2
package/system/zram-swap/files/zram.init
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@ -182,7 +182,7 @@ start()
zram_comp_streams "$zram_dev"
echo $(( $zram_size * 1024 * 1024 )) >"/sys/block/$( basename "$zram_dev" )/disksize"
mkswap "$zram_dev"
swapon $zram_priority "$zram_dev"
swapon -d $zram_priority "$zram_dev"
}
stop()