abd39a8289
To avoid deadlocking the system it is crucial that all memory allocations performed in the zio_execute() call path are marked KM_PUSHPAGE (GFP_NOFS). This ensures that while a z_wr_iss thread is processing the syncing transaction group it does not re-enter the filesystem code and deadlock on itself. Call Trace: [<ffffffffa02580e8>] cv_wait_common+0x78/0xe0 [spl] [<ffffffffa0347bab>] txg_wait_open+0x7b/0xa0 [zfs] [<ffffffffa030e73d>] dmu_tx_wait+0xed/0xf0 [zfs] [<ffffffffa0376a49>] zfs_putpage+0x219/0x360 [zfs] [<ffffffffa038d75e>] zpl_putpage+0x1e/0x60 [zfs] [<ffffffffa038d7b2>] zpl_writepage+0x12/0x20 [zfs] [<ffffffff8115f907>] writeout+0xa7/0xd0 [<ffffffff8115fa6b>] move_to_new_page+0x13b/0x170 [<ffffffff8115fed4>] migrate_pages+0x434/0x4c0 [<ffffffff811559ab>] compact_zone+0x4fb/0x780 [<ffffffff81155ed1>] compact_zone_order+0xa1/0xe0 [<ffffffff8115602c>] try_to_compact_pages+0x11c/0x190 [<ffffffff811200bb>] __alloc_pages_nodemask+0x5eb/0x8b0 [<ffffffff81159932>] kmem_getpages+0x62/0x170 [<ffffffff8115a54a>] fallback_alloc+0x1ba/0x270 [<ffffffff8115a2c9>] ____cache_alloc_node+0x99/0x160 [<ffffffff8115b059>] __kmalloc+0x189/0x220 [<ffffffffa02539fb>] kmem_alloc_debug+0xeb/0x130 [spl] [<ffffffffa031454a>] dnode_hold_impl+0x46a/0x550 [zfs] [<ffffffffa0314649>] dnode_hold+0x19/0x20 [zfs] [<ffffffffa03042e3>] dmu_read+0x33/0x180 [zfs] [<ffffffffa034729d>] space_map_load+0xfd/0x320 [zfs] [<ffffffffa03300bc>] metaslab_activate+0x10c/0x170 [zfs] [<ffffffffa0330ad9>] metaslab_alloc+0x469/0x800 [zfs] [<ffffffffa038963c>] zio_dva_allocate+0x6c/0x2f0 [zfs] [<ffffffffa038a249>] zio_execute+0x99/0xf0 [zfs] [<ffffffffa0254b1c>] taskq_thread+0x1cc/0x330 [spl] [<ffffffff8108ddf6>] kthread+0x96/0xa0 Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Issue #291 |
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| cmd | ||
| config | ||
| dracut | ||
| etc | ||
| include | ||
| lib | ||
| man | ||
| module | ||
| patches | ||
| scripts | ||
| .gitignore | ||
| AUTHORS | ||
| COPYING | ||
| COPYRIGHT | ||
| ChangeLog | ||
| DISCLAIMER | ||
| META | ||
| Makefile.am | ||
| Makefile.in | ||
| OPENSOLARIS.LICENSE | ||
| README.markdown | ||
| ZFS.RELEASE | ||
| autogen.sh | ||
| configure | ||
| configure.ac | ||
| zfs-modules.spec.in | ||
| zfs-script-config.sh.in | ||
| zfs.spec.in | ||
| zfs_config.h.in | ||
README.markdown
Native ZFS for Linux! ZFS is an advanced file system and volume manager which was originally developed for Solaris. It has been successfully ported to FreeBSD and now there is a functional Linux ZFS kernel port too. The port currently includes a fully functional and stable SPA, DMU, and ZVOL with a ZFS Posix Layer (ZPL) on the way!
$ ./configure
$ make pkg
Full documentation for building, configuring, and using ZFS can be found at: http://zfsonlinux.org