*/staticintrb_transfer(struct request *req){//struct rb_device *dev = (struct rb_device *)(req->rq_disk->private_data);intdir = rq_data_dir(req);sector_tstart_sector = blk_rq_pos(req);unsignedintsector_cnt =blk_rq_sectors(req);#if(LINUX_VERSION_CODE < KERNEL_VERSION(3,14,0))...
linux内核函数之blk_plug 分析: /**blk_plug permits building a queue of related requests by holding the I/O* fragments for a short period. This allows merging of sequential requests* into single larger request. As the requests are moved from a per-task list to* the device's request_queue...
linux内核函数之blk_plug 分析: /**blk_plug permits building a queue of related requests by holding the I/O* fragments for a short period. This allows merging of sequential requests* into single larger request. As the requests are moved from a per-task list to* the device's request_queue...
* blk_plug permits building a queue of related requests by holding the I/O * fragments for a short period. This allows merging of sequential requests * into single larger request. As the requests are moved from a per-task list to * the device's request_queue in a batch, this results ...
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intblkdev_issue_discard(structblock_device*bdev,sector_tsector, sector_tnr_sects,gfp_tgfp_mask,unsigned longflags) { structbio*bio=NULL; structblk_plugplug; intret; blk_start_plug(&plug); ret=__blkdev_issue_discard(bdev,sector,nr_sects,gfp_mask,flags, ...
blk_finish_plug(&plug); } elsespin_unlock_irq(&conf->device_lock); }4 changes: 4 additions & 0 deletions 4 drivers/md/raid10.c Original file line numberDiff line numberDiff line change @@ -890,10 +890,13 @@ static void flush_pending_writes(struct r10conf *conf)spin...
intblk_trace_ioctl(structblock_device *bdev, unsigned cmd,char__user *arg) {structrequest_queue *q;intret, start =0;charb[BDEVNAME_SIZE]; q=bdev_get_queue(bdev);if(!q)return-ENXIO; mutex_lock(&bdev->bd_mutex);switch(cmd) {caseBLKTRACESETUP: ...
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