* [PATCH 1/2] bcache: Remove redundant set_capacity @ 2016-11-25 1:39 Yijing Wang 2016-11-27 7:57 ` Coly Li 2016-11-29 20:49 ` Eric Wheeler 0 siblings, 2 replies; 9+ messages in thread From: Yijing Wang @ 2016-11-25 1:39 UTC (permalink / raw) To: axboe, kent.overstreet Cc: git, colyli, linux-bcache, linux-kernel, Yijing Wang set_capacity() has been called in bcache_device_init(), remove the redundant one. Signed-off-by: Yijing Wang <wangyijing@huawei.com> --- drivers/md/bcache/super.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c index 849ad44..b638a16 100644 --- a/drivers/md/bcache/super.c +++ b/drivers/md/bcache/super.c @@ -1126,9 +1126,6 @@ static int cached_dev_init(struct cached_dev *dc, unsigned block_size) if (ret) return ret; - set_capacity(dc->disk.disk, - dc->bdev->bd_part->nr_sects - dc->sb.data_offset); - dc->disk.disk->queue->backing_dev_info.ra_pages = max(dc->disk.disk->queue->backing_dev_info.ra_pages, q->backing_dev_info.ra_pages); -- 2.5.0 ^ permalink raw reply related [flat|nested] 9+ messages in thread
* Re: [PATCH 1/2] bcache: Remove redundant set_capacity 2016-11-25 1:39 [PATCH 1/2] bcache: Remove redundant set_capacity Yijing Wang @ 2016-11-27 7:57 ` Coly Li 2016-11-28 0:51 ` wangyijing 2016-11-29 20:49 ` Eric Wheeler 1 sibling, 1 reply; 9+ messages in thread From: Coly Li @ 2016-11-27 7:57 UTC (permalink / raw) To: Yijing Wang, axboe, kent.overstreet Cc: git, colyli, linux-bcache, linux-kernel On 2016/11/25 上午9:39, Yijing Wang wrote: > set_capacity() has been called in bcache_device_init(), > remove the redundant one. > > Signed-off-by: Yijing Wang <wangyijing@huawei.com> > --- > drivers/md/bcache/super.c | 3 --- > 1 file changed, 3 deletions(-) > > diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c > index 849ad44..b638a16 100644 > --- a/drivers/md/bcache/super.c > +++ b/drivers/md/bcache/super.c > @@ -1126,9 +1126,6 @@ static int cached_dev_init(struct cached_dev *dc, unsigned block_size) > if (ret) > return ret; > > - set_capacity(dc->disk.disk, > - dc->bdev->bd_part->nr_sects - dc->sb.data_offset); > - > dc->disk.disk->queue->backing_dev_info.ra_pages = > max(dc->disk.disk->queue->backing_dev_info.ra_pages, > q->backing_dev_info.ra_pages); > Hi Yijing, Nice catch, it looks good to me. Acked-by: Coly Li <colyli@suse.de> -- Coly Li ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH 1/2] bcache: Remove redundant set_capacity 2016-11-27 7:57 ` Coly Li @ 2016-11-28 0:51 ` wangyijing 0 siblings, 0 replies; 9+ messages in thread From: wangyijing @ 2016-11-28 0:51 UTC (permalink / raw) To: Coly Li, axboe, kent.overstreet; +Cc: git, colyli, linux-bcache, linux-kernel 在 2016/11/27 15:57, Coly Li 写道: > On 2016/11/25 上午9:39, Yijing Wang wrote: >> set_capacity() has been called in bcache_device_init(), >> remove the redundant one. >> >> Signed-off-by: Yijing Wang <wangyijing@huawei.com> >> --- >> drivers/md/bcache/super.c | 3 --- >> 1 file changed, 3 deletions(-) >> >> diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c >> index 849ad44..b638a16 100644 >> --- a/drivers/md/bcache/super.c >> +++ b/drivers/md/bcache/super.c >> @@ -1126,9 +1126,6 @@ static int cached_dev_init(struct cached_dev *dc, unsigned block_size) >> if (ret) >> return ret; >> >> - set_capacity(dc->disk.disk, >> - dc->bdev->bd_part->nr_sects - dc->sb.data_offset); >> - >> dc->disk.disk->queue->backing_dev_info.ra_pages = >> max(dc->disk.disk->queue->backing_dev_info.ra_pages, >> q->backing_dev_info.ra_pages); >> > > Hi Yijing, > > Nice catch, it looks good to me. > > Acked-by: Coly Li <colyli@suse.de> Thanks! > ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH 1/2] bcache: Remove redundant set_capacity 2016-11-25 1:39 [PATCH 1/2] bcache: Remove redundant set_capacity Yijing Wang 2016-11-27 7:57 ` Coly Li @ 2016-11-29 20:49 ` Eric Wheeler 2016-11-30 2:00 ` wangyijing 1 sibling, 1 reply; 9+ messages in thread From: Eric Wheeler @ 2016-11-29 20:49 UTC (permalink / raw) To: Yijing Wang Cc: axboe, kent.overstreet, git, colyli, linux-bcache, linux-kernel On Fri, 25 Nov 2016, Yijing Wang wrote: > set_capacity() has been called in bcache_device_init(), > remove the redundant one. > > Signed-off-by: Yijing Wang <wangyijing@huawei.com> > --- > drivers/md/bcache/super.c | 3 --- > 1 file changed, 3 deletions(-) > > diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c > index 849ad44..b638a16 100644 > --- a/drivers/md/bcache/super.c > +++ b/drivers/md/bcache/super.c > @@ -1126,9 +1126,6 @@ static int cached_dev_init(struct cached_dev *dc, unsigned block_size) > if (ret) > return ret; > > - set_capacity(dc->disk.disk, > - dc->bdev->bd_part->nr_sects - dc->sb.data_offset); > - It probably is a duplicate set_capacity, but has anyone tested bringing on a writeback volume, and late-attaching the cache volume with this patch applied? Otherwise stated, is it possible to get the backing device attached without setting the capacity? -Eric > dc->disk.disk->queue->backing_dev_info.ra_pages = > max(dc->disk.disk->queue->backing_dev_info.ra_pages, > q->backing_dev_info.ra_pages); > -- > 2.5.0 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-bcache" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH 1/2] bcache: Remove redundant set_capacity 2016-11-29 20:49 ` Eric Wheeler @ 2016-11-30 2:00 ` wangyijing 2016-11-30 18:34 ` Eric Wheeler 0 siblings, 1 reply; 9+ messages in thread From: wangyijing @ 2016-11-30 2:00 UTC (permalink / raw) To: Eric Wheeler Cc: axboe, kent.overstreet, git, colyli, linux-bcache, linux-kernel 在 2016/11/30 4:49, Eric Wheeler 写道: > On Fri, 25 Nov 2016, Yijing Wang wrote: > >> set_capacity() has been called in bcache_device_init(), >> remove the redundant one. >> >> Signed-off-by: Yijing Wang <wangyijing@huawei.com> >> --- >> drivers/md/bcache/super.c | 3 --- >> 1 file changed, 3 deletions(-) >> >> diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c >> index 849ad44..b638a16 100644 >> --- a/drivers/md/bcache/super.c >> +++ b/drivers/md/bcache/super.c >> @@ -1126,9 +1126,6 @@ static int cached_dev_init(struct cached_dev *dc, unsigned block_size) >> if (ret) >> return ret; >> >> - set_capacity(dc->disk.disk, >> - dc->bdev->bd_part->nr_sects - dc->sb.data_offset); >> - > > It probably is a duplicate set_capacity, but has anyone tested bringing on > a writeback volume, and late-attaching the cache volume with this patch > applied? > > Otherwise stated, is it possible to get the backing device attached > without setting the capacity? Hi Eric, I tested this case in following steps, the result is fine, the capability is setted. [root@38 sys]# make-bcache -B /dev/nvme1n1 UUID: 6758bd42-c226-4de9-a6d5-fb003af63f9f Set UUID: 2661eadd-79b4-4c56-a2fb-9f8b505aa9fd version: 1 block_size: 1 data_offset: 16 [root@38 sys]# ls /dev/bcache bcache/ bcache0 [root@38 sys]# fdisk -l Disk /dev/nvme1n1: 1.8 TiB, 2000398934016 bytes, 3907029168 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes .... Disk /dev/bcache0: 1.8 TiB, 2000398925824 bytes, 3907029152 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes .... [root@38 sys]# make-bcache -C /dev/ram0 UUID: b64a4425-b9c1-4650-9cab-3856410c9566 Set UUID: a0a31965-a89d-43b6-a5d6-968897abeb7a version: 0 nbuckets: 1024 block_size: 1 bucket_size: 1024 nr_in_set: 1 nr_this_dev: 0 first_bucket: 1 [root@38 sys]# echo a0a31965-a89d-43b6-a5d6-968897abeb7a > /sys/block/bcache0/bcache/attach [root@38 sys]# echo writeback > /sys/block/bcache0/bcache/cache_mode [root@38 sys]# mount /dev/bcache0 /tmp [root@38 sys]# cd /tmp/ [root@38 tmp]# fio ~/fio_write.sh file1: (g=0): rw=randwrite, bs=4K-4K/4K-4K/4K-4K, ioengine=psync, iodepth=1 fio-2.2.8 Starting 1 thread file1: Laying out IO file(s) (1 file(s) / 128MB) Jobs: 1 (f=1): [w(1)] [0.0% done] [0KB/177.2MB/0KB /s] [0/45.4K/0 iops] [eta 05h:33m:13s] Thanks! Yijing. > > -Eric > >> dc->disk.disk->queue->backing_dev_info.ra_pages = >> max(dc->disk.disk->queue->backing_dev_info.ra_pages, >> q->backing_dev_info.ra_pages); >> -- >> 2.5.0 >> >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-bcache" in >> the body of a message to majordomo@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html >> > > . > ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH 1/2] bcache: Remove redundant set_capacity 2016-11-30 2:00 ` wangyijing @ 2016-11-30 18:34 ` Eric Wheeler 2016-12-01 9:24 ` wangyijing 0 siblings, 1 reply; 9+ messages in thread From: Eric Wheeler @ 2016-11-30 18:34 UTC (permalink / raw) To: wangyijing Cc: axboe, kent.overstreet, git, colyli, linux-bcache, linux-kernel [-- Attachment #1: Type: TEXT/PLAIN, Size: 3798 bytes --] On Wed, 30 Nov 2016, wangyijing wrote: > > > 在 2016/11/30 4:49, Eric Wheeler 写道: > > On Fri, 25 Nov 2016, Yijing Wang wrote: > > > >> set_capacity() has been called in bcache_device_init(), > >> remove the redundant one. > >> > >> Signed-off-by: Yijing Wang <wangyijing@huawei.com> > >> --- > >> drivers/md/bcache/super.c | 3 --- > >> 1 file changed, 3 deletions(-) > >> > >> diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c > >> index 849ad44..b638a16 100644 > >> --- a/drivers/md/bcache/super.c > >> +++ b/drivers/md/bcache/super.c > >> @@ -1126,9 +1126,6 @@ static int cached_dev_init(struct cached_dev *dc, unsigned block_size) > >> if (ret) > >> return ret; > >> > >> - set_capacity(dc->disk.disk, > >> - dc->bdev->bd_part->nr_sects - dc->sb.data_offset); > >> - > > > > It probably is a duplicate set_capacity, but has anyone tested bringing on > > a writeback volume, and late-attaching the cache volume with this patch > > applied? > > > > Otherwise stated, is it possible to get the backing device attached > > without setting the capacity? > > Hi Eric, I tested this case in following steps, the result is fine, the capability is setted. > > [root@38 sys]# make-bcache -B /dev/nvme1n1 > UUID: 6758bd42-c226-4de9-a6d5-fb003af63f9f > Set UUID: 2661eadd-79b4-4c56-a2fb-9f8b505aa9fd > version: 1 > block_size: 1 > data_offset: 16 > [root@38 sys]# ls /dev/bcache > bcache/ bcache0 > [root@38 sys]# fdisk -l > Disk /dev/nvme1n1: 1.8 TiB, 2000398934016 bytes, 3907029168 sectors > Units: sectors of 1 * 512 = 512 bytes > Sector size (logical/physical): 512 bytes / 512 bytes > I/O size (minimum/optimal): 512 bytes / 512 bytes > .... > Disk /dev/bcache0: 1.8 TiB, 2000398925824 bytes, 3907029152 sectors > Units: sectors of 1 * 512 = 512 bytes > Sector size (logical/physical): 512 bytes / 512 bytes > I/O size (minimum/optimal): 512 bytes / 512 bytes > .... > [root@38 sys]# make-bcache -C /dev/ram0 > UUID: b64a4425-b9c1-4650-9cab-3856410c9566 > Set UUID: a0a31965-a89d-43b6-a5d6-968897abeb7a > version: 0 > nbuckets: 1024 > block_size: 1 > bucket_size: 1024 > nr_in_set: 1 > nr_this_dev: 0 > first_bucket: 1 > [root@38 sys]# echo a0a31965-a89d-43b6-a5d6-968897abeb7a > /sys/block/bcache0/bcache/attach > [root@38 sys]# echo writeback > /sys/block/bcache0/bcache/cache_mode > [root@38 sys]# mount /dev/bcache0 /tmp > [root@38 sys]# cd /tmp/ > [root@38 tmp]# fio ~/fio_write.sh > file1: (g=0): rw=randwrite, bs=4K-4K/4K-4K/4K-4K, ioengine=psync, iodepth=1 > fio-2.2.8 > Starting 1 thread > file1: Laying out IO file(s) (1 file(s) / 128MB) > Jobs: 1 (f=1): [w(1)] [0.0% done] [0KB/177.2MB/0KB /s] [0/45.4K/0 iops] [eta 05h:33m:13s] > > Thanks! > Yijing. I want to make sure that the set_capacity call that happens on cache attachment is not necessary when a backing device is attached without its dirty writeback cache since bcache0 is not presented until the cache attaches in that case. Can you also unregister the volume, attach the backing device first, and then the cache while the cache is dirty to make sure that the size is set correctly? -- Eric Wheeler > > > > > -Eric > > > >> dc->disk.disk->queue->backing_dev_info.ra_pages = > >> max(dc->disk.disk->queue->backing_dev_info.ra_pages, > >> q->backing_dev_info.ra_pages); > >> -- > >> 2.5.0 > >> > >> -- > >> To unsubscribe from this list: send the line "unsubscribe linux-bcache" in > >> the body of a message to majordomo@vger.kernel.org > >> More majordomo info at http://vger.kernel.org/majordomo-info.html > >> > > > > . > > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-bcache" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH 1/2] bcache: Remove redundant set_capacity 2016-11-30 18:34 ` Eric Wheeler @ 2016-12-01 9:24 ` wangyijing 2016-12-01 22:02 ` Eric Wheeler 0 siblings, 1 reply; 9+ messages in thread From: wangyijing @ 2016-12-01 9:24 UTC (permalink / raw) To: Eric Wheeler Cc: axboe, kent.overstreet, git, colyli, linux-bcache, linux-kernel >>> It probably is a duplicate set_capacity, but has anyone tested bringing on >>> a writeback volume, and late-attaching the cache volume with this patch >>> applied? >>> >>> Otherwise stated, is it possible to get the backing device attached >>> without setting the capacity? >> >> Hi Eric, I tested this case in following steps, the result is fine, the capability is setted. >> >> [root@38 sys]# make-bcache -B /dev/nvme1n1 >> UUID: 6758bd42-c226-4de9-a6d5-fb003af63f9f >> Set UUID: 2661eadd-79b4-4c56-a2fb-9f8b505aa9fd >> version: 1 >> block_size: 1 >> data_offset: 16 >> [root@38 sys]# ls /dev/bcache >> bcache/ bcache0 >> [root@38 sys]# fdisk -l >> Disk /dev/nvme1n1: 1.8 TiB, 2000398934016 bytes, 3907029168 sectors >> Units: sectors of 1 * 512 = 512 bytes >> Sector size (logical/physical): 512 bytes / 512 bytes >> I/O size (minimum/optimal): 512 bytes / 512 bytes >> .... >> Disk /dev/bcache0: 1.8 TiB, 2000398925824 bytes, 3907029152 sectors >> Units: sectors of 1 * 512 = 512 bytes >> Sector size (logical/physical): 512 bytes / 512 bytes >> I/O size (minimum/optimal): 512 bytes / 512 bytes >> .... >> [root@38 sys]# make-bcache -C /dev/ram0 >> UUID: b64a4425-b9c1-4650-9cab-3856410c9566 >> Set UUID: a0a31965-a89d-43b6-a5d6-968897abeb7a >> version: 0 >> nbuckets: 1024 >> block_size: 1 >> bucket_size: 1024 >> nr_in_set: 1 >> nr_this_dev: 0 >> first_bucket: 1 >> [root@38 sys]# echo a0a31965-a89d-43b6-a5d6-968897abeb7a > /sys/block/bcache0/bcache/attach >> [root@38 sys]# echo writeback > /sys/block/bcache0/bcache/cache_mode >> [root@38 sys]# mount /dev/bcache0 /tmp >> [root@38 sys]# cd /tmp/ >> [root@38 tmp]# fio ~/fio_write.sh >> file1: (g=0): rw=randwrite, bs=4K-4K/4K-4K/4K-4K, ioengine=psync, iodepth=1 >> fio-2.2.8 >> Starting 1 thread >> file1: Laying out IO file(s) (1 file(s) / 128MB) >> Jobs: 1 (f=1): [w(1)] [0.0% done] [0KB/177.2MB/0KB /s] [0/45.4K/0 iops] [eta 05h:33m:13s] >> >> Thanks! >> Yijing. > > I want to make sure that the set_capacity call that happens on cache > attachment is not necessary when a backing device is attached without Hi Eric, set_capacity() which removed in this patch is happened at cached_dev_init() which is called when register a backing device, what do you mean "set_capacity call that happens on cache > attachment" ? > its dirty writeback cache since bcache0 is not presented until the cache > attaches in that case. I found bcache0 device present once we do make-bcache -B /dev/nvme1n1. before attach the cache set. So I missed something ? > > Can you also unregister the volume, attach the backing device first, and > then the cache while the cache is dirty to make sure that the size is set > correctly? When I unregister the cache device, I found all the dirty data has been flushed to backing device, so how can I do the test the case as you point ? Thanks! Yijing. > > -- > Eric Wheeler > >> >>> >>> -Eric >>> >>>> dc->disk.disk->queue->backing_dev_info.ra_pages = >>>> max(dc->disk.disk->queue->backing_dev_info.ra_pages, >>>> q->backing_dev_info.ra_pages); >>>> -- >>>> 2.5.0 >>>> >>>> -- >>>> To unsubscribe from this list: send the line "unsubscribe linux-bcache" in >>>> the body of a message to majordomo@vger.kernel.org >>>> More majordomo info at http://vger.kernel.org/majordomo-info.html >>>> >>> >>> . >>> >> >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-bcache" in >> the body of a message to majordomo@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH 1/2] bcache: Remove redundant set_capacity 2016-12-01 9:24 ` wangyijing @ 2016-12-01 22:02 ` Eric Wheeler 2016-12-02 0:54 ` wangyijing 0 siblings, 1 reply; 9+ messages in thread From: Eric Wheeler @ 2016-12-01 22:02 UTC (permalink / raw) To: wangyijing Cc: axboe, kent.overstreet, git, colyli, linux-bcache, linux-kernel On Thu, 1 Dec 2016, wangyijing wrote: > > >>> It probably is a duplicate set_capacity, but has anyone tested bringing on > >>> a writeback volume, and late-attaching the cache volume with this patch > >>> applied? > >>> > >>> Otherwise stated, is it possible to get the backing device attached > >>> without setting the capacity? > >> > >> Hi Eric, I tested this case in following steps, the result is fine, the capability is setted. > >> > >> [root@38 sys]# make-bcache -B /dev/nvme1n1 > >> UUID: 6758bd42-c226-4de9-a6d5-fb003af63f9f > >> Set UUID: 2661eadd-79b4-4c56-a2fb-9f8b505aa9fd > >> version: 1 > >> block_size: 1 > >> data_offset: 16 > >> [root@38 sys]# ls /dev/bcache > >> bcache/ bcache0 > >> [root@38 sys]# fdisk -l > >> Disk /dev/nvme1n1: 1.8 TiB, 2000398934016 bytes, 3907029168 sectors > >> Units: sectors of 1 * 512 = 512 bytes > >> Sector size (logical/physical): 512 bytes / 512 bytes > >> I/O size (minimum/optimal): 512 bytes / 512 bytes > >> .... > >> Disk /dev/bcache0: 1.8 TiB, 2000398925824 bytes, 3907029152 sectors > >> Units: sectors of 1 * 512 = 512 bytes > >> Sector size (logical/physical): 512 bytes / 512 bytes > >> I/O size (minimum/optimal): 512 bytes / 512 bytes > >> .... > >> [root@38 sys]# make-bcache -C /dev/ram0 > >> UUID: b64a4425-b9c1-4650-9cab-3856410c9566 > >> Set UUID: a0a31965-a89d-43b6-a5d6-968897abeb7a > >> version: 0 > >> nbuckets: 1024 > >> block_size: 1 > >> bucket_size: 1024 > >> nr_in_set: 1 > >> nr_this_dev: 0 > >> first_bucket: 1 > >> [root@38 sys]# echo a0a31965-a89d-43b6-a5d6-968897abeb7a > /sys/block/bcache0/bcache/attach > >> [root@38 sys]# echo writeback > /sys/block/bcache0/bcache/cache_mode > >> [root@38 sys]# mount /dev/bcache0 /tmp > >> [root@38 sys]# cd /tmp/ > >> [root@38 tmp]# fio ~/fio_write.sh > >> file1: (g=0): rw=randwrite, bs=4K-4K/4K-4K/4K-4K, ioengine=psync, iodepth=1 > >> fio-2.2.8 > >> Starting 1 thread > >> file1: Laying out IO file(s) (1 file(s) / 128MB) > >> Jobs: 1 (f=1): [w(1)] [0.0% done] [0KB/177.2MB/0KB /s] [0/45.4K/0 iops] [eta 05h:33m:13s] > >> > >> Thanks! > >> Yijing. > > > > I want to make sure that the set_capacity call that happens on cache > > attachment is not necessary when a backing device is attached without > > Hi Eric, set_capacity() which removed in this patch is happened at cached_dev_init() > which is called when register a backing device, what do you mean "set_capacity call that happens on cache > > attachment" ? I'm sorry, you are correct. I though this was the cache-dev attachment, not the cached-dev attachment. Looks good. Reviewed-by: Eric Wheeler <bcache@linux.ewheeler.net> -- Eric Wheeler > > > > its dirty writeback cache since bcache0 is not presented until the cache > > attaches in that case. > > I found bcache0 device present once we do make-bcache -B /dev/nvme1n1. before attach the cache set. > So I missed something ? > > > > > Can you also unregister the volume, attach the backing device first, and > > then the cache while the cache is dirty to make sure that the size is set > > correctly? > > When I unregister the cache device, I found all the dirty data has been flushed to > backing device, so how can I do the test the case as you point ? > > Thanks! > Yijing. > > > > > -- > > Eric Wheeler > > > >> > >>> > >>> -Eric > >>> > >>>> dc->disk.disk->queue->backing_dev_info.ra_pages = > >>>> max(dc->disk.disk->queue->backing_dev_info.ra_pages, > >>>> q->backing_dev_info.ra_pages); > >>>> -- > >>>> 2.5.0 > >>>> > >>>> -- > >>>> To unsubscribe from this list: send the line "unsubscribe linux-bcache" in > >>>> the body of a message to majordomo@vger.kernel.org > >>>> More majordomo info at http://vger.kernel.org/majordomo-info.html > >>>> > >>> > >>> . > >>> > >> > >> -- > >> To unsubscribe from this list: send the line "unsubscribe linux-bcache" in > >> the body of a message to majordomo@vger.kernel.org > >> More majordomo info at http://vger.kernel.org/majordomo-info.html > > ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH 1/2] bcache: Remove redundant set_capacity 2016-12-01 22:02 ` Eric Wheeler @ 2016-12-02 0:54 ` wangyijing 0 siblings, 0 replies; 9+ messages in thread From: wangyijing @ 2016-12-02 0:54 UTC (permalink / raw) To: Eric Wheeler Cc: axboe, kent.overstreet, git, colyli, linux-bcache, linux-kernel >>> I want to make sure that the set_capacity call that happens on cache >>> attachment is not necessary when a backing device is attached without >> >> Hi Eric, set_capacity() which removed in this patch is happened at cached_dev_init() >> which is called when register a backing device, what do you mean "set_capacity call that happens on cache >>> attachment" ? > > > I'm sorry, you are correct. I though this was the cache-dev attachment, > not the cached-dev attachment. Looks good. > > Reviewed-by: Eric Wheeler <bcache@linux.ewheeler.net> > Thanks！ > -- > Eric Wheeler > >> >> >>> its dirty writeback cache since bcache0 is not presented until the cache >>> attaches in that case. >> >> I found bcache0 device present once we do make-bcache -B /dev/nvme1n1. before attach the cache set. >> So I missed something ? >> >>> >>> Can you also unregister the volume, attach the backing device first, and >>> then the cache while the cache is dirty to make sure that the size is set >>> correctly? >> >> When I unregister the cache device, I found all the dirty data has been flushed to >> backing device, so how can I do the test the case as you point ? >> >> Thanks! >> Yijing. >> >>> >>> -- >>> Eric Wheeler >>> >>>> >>>>> >>>>> -Eric >>>>> >>>>>> dc->disk.disk->queue->backing_dev_info.ra_pages = >>>>>> max(dc->disk.disk->queue->backing_dev_info.ra_pages, >>>>>> q->backing_dev_info.ra_pages); >>>>>> -- >>>>>> 2.5.0 >>>>>> >>>>>> -- >>>>>> To unsubscribe from this list: send the line "unsubscribe linux-bcache" in >>>>>> the body of a message to majordomo@vger.kernel.org >>>>>> More majordomo info at http://vger.kernel.org/majordomo-info.html >>>>>> >>>>> >>>>> . >>>>> >>>> >>>> -- >>>> To unsubscribe from this list: send the line "unsubscribe linux-bcache" in >>>> the body of a message to majordomo@vger.kernel.org >>>> More majordomo info at http://vger.kernel.org/majordomo-info.html >> >> > > . > ^ permalink raw reply [flat|nested] 9+ messages in thread
end of thread, other threads:[~2016-12-02 0:54 UTC | newest] Thread overview: 9+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2016-11-25 1:39 [PATCH 1/2] bcache: Remove redundant set_capacity Yijing Wang 2016-11-27 7:57 ` Coly Li 2016-11-28 0:51 ` wangyijing 2016-11-29 20:49 ` Eric Wheeler 2016-11-30 2:00 ` wangyijing 2016-11-30 18:34 ` Eric Wheeler 2016-12-01 9:24 ` wangyijing 2016-12-01 22:02 ` Eric Wheeler 2016-12-02 0:54 ` wangyijing
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for NNTP newsgroup(s).