linux-kernel - Re: [PATCH v2 03/10] raid-md: reduce stack footprint dealing with block device names

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Date:   Wed, 23 Jun 2021 16:26:30 +0800
From:   Guoqing Jiang <jiangguoqing@...inos.cn>
To:     Anton Suvorov <warwish@...dex-team.ru>, willy@...radead.org
Cc:     dmtrmonakhov@...dex-team.ru, linux-block@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        viro@...iv.linux.org.uk
Subject: Re: [PATCH v2 03/10] raid-md: reduce stack footprint dealing with
 block device names

Hi,

Maybe replace "raid-md" with "md/raid" or just "md".

On 6/23/21 1:44 AM, Anton Suvorov wrote:
> Stack usage reduced (measured with allyesconfig):
>
> ./drivers/md/md-linear.c	linear_make_request	248	112	-136
> ./drivers/md/md-multipath.c	multipath_end_request	232	96	-136
> ./drivers/md/md-multipath.c	multipath_error	208	72	-136
> ./drivers/md/md-multipath.c	multipathd	248	112	-136
> ./drivers/md/md-multipath.c	print_multipath_conf	208	64	-144
> ./drivers/md/md.c	autorun_devices	312	184	-128
> ./drivers/md/md.c	export_rdev	168	32	-136
> ./drivers/md/md.c	md_add_new_disk	280	80	-200
> ./drivers/md/md.c	md_import_device	200	56	-144
> ./drivers/md/md.c	md_integrity_add_rdev	192	56	-136
> ./drivers/md/md.c	md_ioctl	560	496	-64
> ./drivers/md/md.c	md_reload_sb	224	88	-136
> ./drivers/md/md.c	md_run	408	288	-120
> ./drivers/md/md.c	md_seq_show	232	96	-136
> ./drivers/md/md.c	md_update_sb	304	168	-136
> ./drivers/md/md.c	read_disk_sb	184	48	-136
> ./drivers/md/md.c	super_1_load	392	192	-200
> ./drivers/md/md.c	super_90_load	304	112	-192
> ./drivers/md/md.c	unbind_rdev_from_array	200	64	-136
> ./drivers/md/raid0.c	create_strip_zones	400	200	-200
> ./drivers/md/raid0.c	dump_zones	536	464	-72
> ./drivers/md/raid1.c	fix_read_error	352	288	-64
> ./drivers/md/raid1.c	print_conf	224	80	-144
> ./drivers/md/raid1.c	raid1_end_read_request	216	80	-136
> ./drivers/md/raid1.c	raid1_error	216	96	-120
> ./drivers/md/raid1.c	sync_request_write	344	208	-136
> ./drivers/md/raid10.c	fix_read_error	392	320	-72
> ./drivers/md/raid10.c	print_conf	216	72	-144
> ./drivers/md/raid10.c	raid10_end_read_request	216	80	-136
> ./drivers/md/raid10.c	raid10_error	216	80	-136
> ./drivers/md/raid5-cache.c	r5l_init_log	224	88	-136
> ./drivers/md/raid5-ppl.c	ppl_do_flush	256	136	-120
> ./drivers/md/raid5-ppl.c	ppl_flush_endio	192	56	-136
> ./drivers/md/raid5-ppl.c	ppl_modify_log	192	56	-136
> ./drivers/md/raid5-ppl.c	ppl_recover_entry	1296	1232	-64
> ./drivers/md/raid5-ppl.c	ppl_submit_iounit_bio	192	56	-136
> ./drivers/md/raid5-ppl.c	ppl_validate_rdev	184	48	-136
> ./drivers/md/raid5.c	print_raid5_conf	208	64	-144
> ./drivers/md/raid5.c	raid5_end_read_request	272	128	-144
> ./drivers/md/raid5.c	raid5_error	216	80	-136
> ./drivers/md/raid5.c	setup_conf	360	296	-64
>
> Signed-off-by: Anton Suvorov <warwish@...dex-team.ru>
> ---
>   drivers/md/md-linear.c    |   5 +-
>   drivers/md/md-multipath.c |  24 +++----
>   drivers/md/md.c           | 135 ++++++++++++++------------------------
>   drivers/md/raid0.c        |  28 ++++----
>   drivers/md/raid1.c        |  25 +++----
>   drivers/md/raid10.c       |  65 ++++++++----------
>   drivers/md/raid5-cache.c  |   5 +-
>   drivers/md/raid5-ppl.c    |  40 +++++------
>   drivers/md/raid5.c        |  39 +++++------
>   9 files changed, 144 insertions(+), 222 deletions(-)

Also a nice cleanup!  Acked-by: Guoqing Jiang <jiangguoqing@...inos.cn>

Thanks,
Guoqing