Re: [PATCH] f2fs: let fstrim issue discard commands in lower priority

On 2018/5/25 14:18, Jaegeuk Kim wrote: > On 05/25, Chao Yu wrote: >> Hi Jaegeuk, >> >> On 2018/5/25 13:10, Jaegeuk Kim wrote: >>> The fstrim gathers huge number of large discard commands, and tries to issue >>> without IO awareness, which results in long user-perceive IO latencies on >>> READ,

Re: [PATCH] f2fs: let fstrim issue discard commands in lower priority

On 2018/5/25 14:18, Jaegeuk Kim wrote: > On 05/25, Chao Yu wrote: >> Hi Jaegeuk, >> >> On 2018/5/25 13:10, Jaegeuk Kim wrote: >>> The fstrim gathers huge number of large discard commands, and tries to issue >>> without IO awareness, which results in long user-perceive IO latencies on >>> READ,

Re: [PATCH] f2fs: let fstrim issue discard commands in lower priority

On 05/25, Chao Yu wrote: > Hi Jaegeuk, > > On 2018/5/25 13:10, Jaegeuk Kim wrote: > > The fstrim gathers huge number of large discard commands, and tries to issue > > without IO awareness, which results in long user-perceive IO latencies on > > READ, WRITE, and FLUSH in UFS. We've observed some

Re: [PATCH] f2fs: let fstrim issue discard commands in lower priority

On 05/25, Chao Yu wrote: > Hi Jaegeuk, > > On 2018/5/25 13:10, Jaegeuk Kim wrote: > > The fstrim gathers huge number of large discard commands, and tries to issue > > without IO awareness, which results in long user-perceive IO latencies on > > READ, WRITE, and FLUSH in UFS. We've observed some

Re: [PATCH] f2fs: let fstrim issue discard commands in lower priority

Hi Jaegeuk, On 2018/5/25 13:10, Jaegeuk Kim wrote: > The fstrim gathers huge number of large discard commands, and tries to issue > without IO awareness, which results in long user-perceive IO latencies on > READ, WRITE, and FLUSH in UFS. We've observed some of commands take several > seconds due

Re: [PATCH] f2fs: let fstrim issue discard commands in lower priority

Hi Jaegeuk, On 2018/5/25 13:10, Jaegeuk Kim wrote: > The fstrim gathers huge number of large discard commands, and tries to issue > without IO awareness, which results in long user-perceive IO latencies on > READ, WRITE, and FLUSH in UFS. We've observed some of commands take several > seconds due

[PATCH] f2fs: let fstrim issue discard commands in lower priority

The fstrim gathers huge number of large discard commands, and tries to issue without IO awareness, which results in long user-perceive IO latencies on READ, WRITE, and FLUSH in UFS. We've observed some of commands take several seconds due to long discard latency. This patch limits the maximum

[PATCH] f2fs: let fstrim issue discard commands in lower priority

The fstrim gathers huge number of large discard commands, and tries to issue without IO awareness, which results in long user-perceive IO latencies on READ, WRITE, and FLUSH in UFS. We've observed some of commands take several seconds due to long discard latency. This patch limits the maximum