search for: virtio_blk_f_write_zeroes

...ort, this will impact the performance when using SSD backend over file systems. The idea here is using 16 Bytes payload as one descriptor for DISCARD/WRITE ZEROES command, users can put several ranges into one command, for the purpose to support such feature, two feature flags VIRTIO_BLK_F_DISCARD/VIRTIO_BLK_F_WRITE_ZEROES and two commands VIRTIO_BLK_T_DISCARD/VIRTIO_BLK_T_WRITE_ZEROES are introduced, and some parameters are added to the configuration space to tell the OS the granularity of DISCARD/WRITE ZEROES commands. The specification change list here: https://github.com/oasis-tcs/virtio-spec CHANGELOG: v3: fin...

...ort, this will impact the performance when using SSD backend over file systems. The idea here is using 16 Bytes payload as one descriptor for DISCARD/WRITE ZEROES command, users can put several ranges into one command, for the purpose to support such feature, two feature flags VIRTIO_BLK_F_DISCARD/VIRTIO_BLK_F_WRITE_ZEROES and two commands VIRTIO_BLK_T_DISCARD/VIRTIO_BLK_T_WRITE_ZEROES are introduced, and some parameters are added to the configuration space to tell the OS the granularity of DISCARD/WRITE ZEROES commands. The specification change list here: https://github.com/oasis-tcs/virtio-spec CHANGELOG: v3: fin...

...le32 max_write_zeroes_seg; u8 write_zeroes_may_unmap; } New feature bit [VIRTIO_BLK_F_DISCARD (13)]: Device can support discard command, maximum discard sectors size in field 'max_discard_sectors' and maximum discard segment number in field 'max_discard_seg'. New feature [VIRTIO_BLK_F_WRITE_ZEROES (14)]: Device can support write zeroes command, maximum write zeroes sectors size in field 'max_write_zeroes_sectors' and maximum write zeroes segment number in field 'max_write_zeroes_seg'. The parameters in the configuration space of the device field 'max_discard_sectors'...

...le32 max_write_zeroes_seg; u8 write_zeroes_may_unmap; } New feature bit [VIRTIO_BLK_F_DISCARD (13)]: Device can support discard command, maximum discard sectors size in field 'max_discard_sectors' and maximum discard segment number in field 'max_discard_seg'. New feature [VIRTIO_BLK_F_WRITE_ZEROES (14)]: Device can support write zeroes command, maximum write zeroes sectors size in field 'max_write_zeroes_sectors' and maximum write zeroes segment number in field 'max_write_zeroes_seg'. The parameters in the configuration space of the device field 'max_discard_sectors'...

...ormance when using SSD > backend over file systems. > > The idea here is using 16 Bytes payload as one descriptor for > DISCARD/WRITE ZEROES command, users can put several ranges into > one command, for the purpose to support such feature, two feature > flags VIRTIO_BLK_F_DISCARD/VIRTIO_BLK_F_WRITE_ZEROES and two > commands VIRTIO_BLK_T_DISCARD/VIRTIO_BLK_T_WRITE_ZEROES are > introduced, and some parameters are added to the configuration > space to tell the OS the granularity of DISCARD/WRITE ZEROES > commands. Pls fix grammar in this comment, I am not sure what are you trying to say....

...le32 max_write_zeroes_seg; u8 write_zeroes_may_unmap; } New feature bit [VIRTIO_BLK_F_DISCARD (13)]: Device can support discard command, maximum discard sectors size in field 'max_discard_sectors' and maximum discard segment number in field 'max_discard_seg'. New feature [VIRTIO_BLK_F_WRITE_ZEROES (14)]: Device can support write zeroes command, maximum write zeroes sectors size in field 'max_write_zeroes_sectors' and maximum write zeroes segment number in field 'max_write_zeroes_seg'. The parameters in the configuration space of the device field 'max_discard_sectors'...

...le32 max_write_zeroes_seg; u8 write_zeroes_may_unmap; } New feature bit [VIRTIO_BLK_F_DISCARD (13)]: Device can support discard command, maximum discard sectors size in field 'max_discard_sectors' and maximum discard segment number in field 'max_discard_seg'. New feature [VIRTIO_BLK_F_WRITE_ZEROES (14)]: Device can support write zeroes command, maximum write zeroes sectors size in field 'max_write_zeroes_sectors' and maximum write zeroes segment number in field 'max_write_zeroes_seg'. The parameters in the configuration space of the device field 'max_discard_sectors'...

...virtio > block specification has been extended to add VIRTIO_BLK_T_DISCARD and > VIRTIO_BLK_T_WRITE_ZEROES commands. This patch enables support for > discard and write zeroes in the virtio-blk driver when the device > advertises the corresponding features, VIRTIO_BLK_F_DISCARD and > VIRTIO_BLK_F_WRITE_ZEROES. > > Signed-off-by: Changpeng Liu <changpeng.liu at intel.com> > Signed-off-by: Daniel Verkamp <dverkamp at chromium.org> > --- > dverkamp: I've picked up this patch and made a few minor changes (as > listed below); most notably, I changed the kmalloc back to GFP_...

...le32 max_write_zeroes_seg; u8 write_zeroes_may_unmap; } New feature bit [VIRTIO_BLK_F_DISCARD (13)]: Device can support discard command, maximum discard sectors size in field 'max_discard_sectors' and maximum discard segment number in field 'max_discard_seg'. New feature [VIRTIO_BLK_F_WRITE_ZEROES (14)]: Device can support write zeroes command, maximum write zeroes sectors size in field 'max_write_zeroes_sectors' and maximum write zeroes segment number in field 'max_write_zeroes_seg'. The parameters in the configuration space of the device field 'max_discard_sectors'...

...le32 max_write_zeroes_seg; u8 write_zeroes_may_unmap; } New feature bit [VIRTIO_BLK_F_DISCARD (13)]: Device can support discard command, maximum discard sectors size in field 'max_discard_sectors' and maximum discard segment number in field 'max_discard_seg'. New feature [VIRTIO_BLK_F_WRITE_ZEROES (14)]: Device can support write zeroes command, maximum write zeroes sectors size in field 'max_write_zeroes_sectors' and maximum write zeroes segment number in field 'max_write_zeroes_seg'. The parameters in the configuration space of the device field 'max_discard_sectors'...

...is-tcs/virtio-spec), the virtio block specification has been extended to add VIRTIO_BLK_T_DISCARD and VIRTIO_BLK_T_WRITE_ZEROES commands. This patch enables support for discard and write zeroes in the virtio-blk driver when the device advertises the corresponding features, VIRTIO_BLK_F_DISCARD and VIRTIO_BLK_F_WRITE_ZEROES. Signed-off-by: Changpeng Liu <changpeng.liu at intel.com> Signed-off-by: Daniel Verkamp <dverkamp at chromium.org> --- dverkamp: I've picked up this patch and made a few minor changes (as listed below); most notably, I changed the kmalloc back to GFP_ATOMIC, since it can be called...

...is-tcs/virtio-spec), the virtio block specification has been extended to add VIRTIO_BLK_T_DISCARD and VIRTIO_BLK_T_WRITE_ZEROES commands. This patch enables support for discard and write zeroes in the virtio-blk driver when the device advertises the corresponding features, VIRTIO_BLK_F_DISCARD and VIRTIO_BLK_F_WRITE_ZEROES. Signed-off-by: Changpeng Liu <changpeng.liu at intel.com> Signed-off-by: Daniel Verkamp <dverkamp at chromium.org> --- dverkamp: I've picked up this patch and made a few minor changes (as listed below); most notably, I changed the kmalloc back to GFP_ATOMIC, since it can be called...

...> } > > > > New feature bit [VIRTIO_BLK_F_DISCARD (13)]: Device can support discard > > command, maximum discard sectors size in field 'max_discard_sectors' and > > maximum discard segment number in field 'max_discard_seg'. > > > > New feature [VIRTIO_BLK_F_WRITE_ZEROES (14)]: Device can support write > > zeroes command, maximum write zeroes sectors size in field > > 'max_write_zeroes_sectors' and maximum write zeroes segment number in > > field 'max_write_zeroes_seg'. > > > > The parameters in the configuration space...

...> } > > > > New feature bit [VIRTIO_BLK_F_DISCARD (13)]: Device can support discard > > command, maximum discard sectors size in field 'max_discard_sectors' and > > maximum discard segment number in field 'max_discard_seg'. > > > > New feature [VIRTIO_BLK_F_WRITE_ZEROES (14)]: Device can support write > > zeroes command, maximum write zeroes sectors size in field > > 'max_write_zeroes_sectors' and maximum write zeroes segment number in > > field 'max_write_zeroes_seg'. > > > > The parameters in the configuration space...

...it [VIRTIO_BLK_F_DISCARD (13)]: Device can support discard > > > > command, maximum discard sectors size in field 'max_discard_sectors' and > > > > maximum discard segment number in field 'max_discard_seg'. > > > > > > > > New feature [VIRTIO_BLK_F_WRITE_ZEROES (14)]: Device can support write > > > > zeroes command, maximum write zeroes sectors size in field > > > > 'max_write_zeroes_sectors' and maximum write zeroes segment number in > > > > field 'max_write_zeroes_seg'. > > > > > > &g...

...u8 write_zeroes_may_unmap; > } > > New feature bit [VIRTIO_BLK_F_DISCARD (13)]: Device can support discard > command, maximum discard sectors size in field 'max_discard_sectors' and > maximum discard segment number in field 'max_discard_seg'. > > New feature [VIRTIO_BLK_F_WRITE_ZEROES (14)]: Device can support write > zeroes command, maximum write zeroes sectors size in field > 'max_write_zeroes_sectors' and maximum write zeroes segment number in > field 'max_write_zeroes_seg'. > > The parameters in the configuration space of the device field >...

...; > New feature bit [VIRTIO_BLK_F_DISCARD (13)]: Device can support discard > > > command, maximum discard sectors size in field 'max_discard_sectors' and > > > maximum discard segment number in field 'max_discard_seg'. > > > > > > New feature [VIRTIO_BLK_F_WRITE_ZEROES (14)]: Device can support write > > > zeroes command, maximum write zeroes sectors size in field > > > 'max_write_zeroes_sectors' and maximum write zeroes segment number in > > > field 'max_write_zeroes_seg'. > > > > > > The parameters in...

...virtio > block specification has been extended to add VIRTIO_BLK_T_DISCARD and > VIRTIO_BLK_T_WRITE_ZEROES commands. This patch enables support for > discard and write zeroes in the virtio-blk driver when the device > advertises the corresponding features, VIRTIO_BLK_F_DISCARD and > VIRTIO_BLK_F_WRITE_ZEROES. > > Signed-off-by: Changpeng Liu <changpeng.liu at intel.com> > Signed-off-by: Daniel Verkamp <dverkamp at chromium.org> > --- > dverkamp: I've picked up this patch and made a few minor changes (as > listed below); most notably, I changed the kmalloc back to GFP_...

...um number of discard segments in a * discard command. */ - __u32 max_discard_seg; + __virtio32 max_discard_seg; /* Discard commands must be aligned to this number of sectors. */ - __u32 discard_sector_alignment; + __virtio32 discard_sector_alignment; /* the next 3 entries are guarded by VIRTIO_BLK_F_WRITE_ZEROES */ /* * The maximum number of write zeroes sectors (in 512-byte sectors) in * one segment. */ - __u32 max_write_zeroes_sectors; + __virtio32 max_write_zeroes_sectors; /* * The maximum number of segments in a write zeroes * command. */ - __u32 max_write_zeroes_seg; + __virtio32...

...um number of discard segments in a * discard command. */ - __u32 max_discard_seg; + __virtio32 max_discard_seg; /* Discard commands must be aligned to this number of sectors. */ - __u32 discard_sector_alignment; + __virtio32 discard_sector_alignment; /* the next 3 entries are guarded by VIRTIO_BLK_F_WRITE_ZEROES */ /* * The maximum number of write zeroes sectors (in 512-byte sectors) in * one segment. */ - __u32 max_write_zeroes_sectors; + __virtio32 max_write_zeroes_sectors; /* * The maximum number of segments in a write zeroes * command. */ - __u32 max_write_zeroes_seg; + __virtio32...