Dmitry Monakhov <dmonakhov@xxxxxxxxxx> writes: > Currently there are many filesystems which has implemented > discard support, but ssd discs not widely used yet. > Let's allow user to use compat discard mode by default. > After this feature is enabled by default for all devices which has > no native discard support it will be possible to use this feature > simply by passing appropriate mount option to fs (-odiscard in ext4) BTW i've run tested ext4 with -odiscard option, and it survived more 24hour of stress tests test which consists of fsstress, compilation, and etc > > This default option has many advantages: > - Hope that this helps in real filesystem testing. > - People who are crazy about data security whould be really happy. > - Virtual machine developers also would like this feature. > > Signed-off-by: Dmitry Monakhov <dmonakhov@xxxxxxxxxx> > --- > include/linux/blkdev.h | 2 +- > 1 files changed, 1 insertions(+), 1 deletions(-) > > diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h > index c762c9f..d7d028c 100644 > --- a/include/linux/blkdev.h > +++ b/include/linux/blkdev.h > @@ -1010,7 +1010,7 @@ static inline int sb_issue_discard(struct super_block *sb, > block <<= (sb->s_blocksize_bits - 9); > nr_blocks <<= (sb->s_blocksize_bits - 9); > return blkdev_issue_discard(sb->s_bdev, block, nr_blocks, GFP_KERNEL, > - DISCARD_FL_BARRIER); > + DISCARD_FL_BARRIER|DISCARD_FL_COMPAT); > } > > extern int blk_verify_command(unsigned char *cmd, fmode_t has_write_perm); -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
