On Wed, Jul 03, 2019 at 12:36:30AM +0200, Andrea Vai wrote: > On 02/07/19 13:51:17, Johannes Thumshirn wrote: > > On Tue, Jul 02, 2019 at 12:46:45PM +0200, Andrea Vai wrote: > > > Hi, > > > I have a problem writing data to a USB pendrive, and it seems > > > kernel-related. With the help of Greg an Alan (thanks) and some > > > bisect, I found out the offending commit being > > > > > > commit f664a3cc17b7d0a2bc3b3ab96181e1029b0ec0e6 > > > > > > [...] > > > > Hi, > > > > Can you please check what IO scheduler you have set for your USB pendrive? > > > > i.e. with: > > cat /sys/block/$DISK/queue/scheduler > > > > # cat /sys/block/sdf/queue/scheduler > [mq-deadline] none One thing you can try as well is building a kernel with CONFIG_IOSCHED_BFQ and use it. Deadline is probably not the best choice for a slow drive. Byte, Johannes -- Johannes Thumshirn SUSE Labs Filesystems jthumshirn@xxxxxxx +49 911 74053 689 SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: Felix Imendörffer, Mary Higgins, Sri Rasiah HRB 21284 (AG Nürnberg) Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850
