[Lustre-discuss] page allocation failure

[Brian J. Murrell]

On Fri, 2008-11-28 at 16:22 +0800, Wang lu wrote:
> 
> Nov 28 16:12:50 boss01 kernel: LustreError: 2129:0:(filter_io_26.c:779:
> filter_commitrw_write()) besfs-OST0005: slow direct_io 53s
> Nov 28 16:12:50 boss01 kernel: LustreError: 871:0:(lustre_fsfilt.h:318:
> fsfilt_commit_wait()) besfs-OST0005: slow journal start 53s
> Nov 28 16:12:50 boss01 kernel: LustreError: 871:0:(filter_io_26.c:792:
> filter_commitrw_write()) besfs-OST0005: slow commitrw commit 53s
> Nov 28 16:13:24 boss01 kernel: LustreError: 838:0:(filter_io_26.c:714:
> filter_commitrw_write()) besfs-OST0002: slow i_mutex 123s
> Nov 28 16:13:24 boss01 kernel: LustreError: 838:0:(filter_io_26.c:714:
> filter_commitrw_write()) Skipped 84 previous similar messages
> Nov 28 16:13:24 boss01 kernel: LustreError: 2107:0:(lustre_fsfilt.h:262:
> fsfilt_brw_start_log()) besfs-OST0002: slow journal start 123s
> Nov 28 16:13:24 boss01 kernel: LustreError: 2107:0:(lustre_fsfilt.h:262:
> fsfilt_brw_start_log()) Skipped 10 previous similar messages
> Nov 28 16:13:24 boss01 kernel: LustreError: 2107:0:(filter_io_26.c:727:
> filter_commitrw_write()) besfs-OST0002: slow brw_start 123s
> Nov 28 16:13:24 boss01 kernel: LustreError: 2107:0:(filter_io_26.c:727:
> filter_commitrw_write()) Skipped 11 previous similar messages
> Nov 28 16:13:24 boss01 kernel: LustreError: 2093:0:(lustre_fsfilt.h:227:
> fsfilt_start_log()) besfs-OST0002: slow journal start 122s
> Nov 28 16:13:24 boss01 kernel: LustreError: 2175:0:(lustre_fsfilt.h:318:
> fsfilt_commit_wait()) besfs-OST0002: 

Your storage is too slow for the OSS load you are throwing at it.  Try
reducing the number of OST threads on your OSSes.  I don't recall
exactly the name of the module option but it is an ost module option.
modinfo should tell you.  I'm sure the operations manual covers this as
well.

b.

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