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    SubjectRe: 2.6.12-mm1 & 2K lun testing (JFS problem ?)
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    I need to re-create the problem to capture stats.
    I don't see any stacks for jfsCommit, jfsSync, jfsIO
    threads in sysrq-t output (in /var/log/messages).
    Hmm. Let me re-create to capture this.

    Thanks,
    Badari

    On Wed, 2005-06-22 at 08:50 -0500, Dave Kleikamp wrote:
    > On Tue, 2005-06-21 at 17:34 -0700, Badari Pulavarty wrote:
    > > Hi Andrew & Shaggy,
    > >
    > > Here is the summary of 2K lun testing on 2.6.12-mm1.
    > >
    > > When I tune dirty ratios and CFQ queue depths, things
    > > seems to be running fine.
    > >
    > > echo 20 > /proc/sys/vm/dirty_ratio
    > > echo 20 > /proc/sys/vm/overcommit_ratio
    > > echo 4 > /sys/block/<device>/queue/nr_requests
    > >
    > >
    > > But, I am running into JFS problem. I can't kill my
    > > "dd" process.
    >
    > Assuming you built the kernel with CONFIG_JFS_STATISTICS, can you send
    > me the contents of /proc/fs/jfs/txstats?
    >
    > > They all get stuck in:
    > >
    > > (I am going to try ext3).
    > >
    > > dd D 0000000000000000 0 12943 1 12939
    > > (NOTLB)
    > > ffff81010612d8f8 0000000000000086 ffff81019677a380 000000000003ffff
    > > 00000000d5b95298 ffff81010612d918 0000000000000003
    > > ffff810169f63880
    > > 00000076d9f1ea00 0000000000000001
    > > Call Trace:<ffffffff802fb31f>{submit_bio+223}
    > > <ffffffff8026a8e1>{txBegin+625}
    >
    > Looks like txBegin is the problem. Probably ran out of txBlocks. Maybe
    > a stack trace of jfsCommit, jfsIO, and jfsSync threads might be useful
    > too.
    >
    > > <ffffffff80130540>{default_wake_function+0}
    > > <ffffffff80130540>{default_wake_function+0}
    > > <ffffffff80250a8b>{jfs_commit_inode+155}
    > > <ffffffff80250daa>{jfs_write_inode+58}
    > > <ffffffff801a8857>{__writeback_single_inode+551}
    > > <ffffffff80250929>{jfs_get_blocks+521}
    > > <ffffffff8015dd4c>{find_get_page+92}
    > > <ffffffff80185555>{__find_get_block_slow+85}
    > > <ffffffff801a8e7c>{generic_sync_sb_inodes+524}
    > > <ffffffff801a91cd>{writeback_inodes+125}
    > > <ffffffff80164aa4>{balance_dirty_pages_ratelimited+228}
    > > <ffffffff8015eb65>{generic_file_buffered_write+1221}
    > > <ffffffff8013b3a5>{current_fs_time+85}
    > > <ffffffff801a9254>{__mark_inode_dirty+52}
    > > <ffffffff8019e4ac>{inode_update_time+188}
    > > <ffffffff8015effa>{__generic_file_aio_write_nolock+938}
    > > <ffffffff8016efa5>{unmap_vmas+965}
    > > <ffffffff8015f1de>{__generic_file_write_nolock+158}
    > > <ffffffff8017149e>{zeromap_page_range+990}
    > > <ffffffff8014d0c0>{autoremove_wake_function+0}
    > > <ffffffff802941b1>{__up_read+33}
    > > <ffffffff8015f345>{generic_file_write+101}
    > > <ffffffff80183b39>{vfs_write+233} <ffffffff80183ce3>{sys_write
    > > +83}
    > > <ffffffff8010dc8e>{system_call+126}
    > >
    >
    > > Thanks,
    > > Badari
    >

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