[#LU-11178] ldiskfs osd to use preallocated buffers instead of pagecache when needed

[LU-11178] ldiskfs osd to use preallocated buffers instead of pagecache when needed Created: 25/Jul/18 Updated: 16/Apr/20 Resolved: 16/Apr/20
Status:	Closed
Project:	Lustre
Component/s:	None
Affects Version/s:	None
Fix Version/s:	None

Type:

Improvement

Priority:

Minor

Reporter:

Alex Zhuravlev

Assignee:

Alex Zhuravlev

Resolution:

Fixed

Votes:

Labels:

None

Environment:

in some cases (SSD?) it makes sense to bypass pagecache to save on related overhead. 1GB/sec IO with 4K pages imply 256K pages/sec to allocate/insert into the cache which can be quite consuming in terms of CPU cycles and locking (especially for shared files).

Rank (Obsolete):

9223372036854775807

Comments

Comment by Cory Spitz [ 30/Nov/18 ]

Is this dup of ~~LU-11347~~?

Comment by Alex Zhuravlev [ 16/Apr/20 ]

fixed with ~~LU-11347~~

Generated at Sat Feb 10 02:41:37 UTC 2024 using Jira 9.4.14#940014-sha1:734e6822bbf0d45eff9af51f82432957f73aa32c.

[LU-11178] ldiskfs osd to use preallocated buffers instead of pagecache when needed Created: 25/Jul/18 Updated: 16/Apr/20 Resolved: 16/Apr/20