mirror_zfs/module
Brian Behlendorf 21ade34764 Disable direct reclaim for z_wr_* threads
The direct reclaim path in the z_wr_* threads must be disabled
to ensure forward progress is always maintained for txg processing.
This ensures that a txg will never get stuck waiting on itself
because it entered the following memory reclaim callpath.

  ->prune_icache()->dispose_list()->zpl_clear_inode()->zfs_inactive()
  ->dmu_tx_assign()->dmu_tx_wait()->tgx_wait_open()

It would be preferable to target this exact code path but the
kernel offers no way to do this without custom patches.  To avoid
this we are forced to disable all reclaim for these threads.  It
should not be necessary to do this for other other z_* threads
because they will not hold a txg open.

Closes #232
2011-05-06 15:26:26 -07:00
..
avl Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
nvpair Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
unicode Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
zcommon Add basic uio support 2011-02-10 09:21:43 -08:00
zfs Disable direct reclaim for z_wr_* threads 2011-05-06 15:26:26 -07:00
zpios Linux 2.6.36 compat, use fops->unlocked_ioctl() 2010-11-10 17:01:08 -08:00
.gitignore Add .gitignore files to exclude build products 2010-01-08 11:35:17 -08:00
Makefile.in Fix make distclean for `./configure --with-config=user 2011-04-05 13:33:28 -07:00