| commit | 8bbb2fba43dfa487685677b4a83d34de08775925 | |
| author | Matthew Dillon <dillon@apollo.backplane.com> | |
| Sat, 6 Nov 2010 17:29:46 +0000 (6 10:29 -0700) | ||
| committer | Matthew Dillon <dillon@apollo.backplane.com> | |
| Sat, 6 Nov 2010 17:29:46 +0000 (6 10:29 -0700) | ||
| tree | 89337169d0aa0e21efd46ea6f8636cdbffa69efb | treesnapshot (tar.gz zip) |
| parent | 136e843fb06cb9682ff05052bf187c08124ec4c2 | commitdiff |
kernel - Fix spinlock held on switch
* flushbufqueues() was holding bufqspin through a buffer cache callback,
causing a kernel panic if the callback winds up blocking. This only
effected UFS not HAMMER).
* Release the spinlock a little earlier so it isn't held around the callback.
* Make a minor semantics change to bio_track_wait() to deal with potential
compiler optimizations messing up the cmpxchg loop.
Reported-by: "goetz@net-amp.com" <goetz@net-amp.com>
* flushbufqueues() was holding bufqspin through a buffer cache callback,
causing a kernel panic if the callback winds up blocking. This only
effected UFS not HAMMER).
* Release the spinlock a little earlier so it isn't held around the callback.
* Make a minor semantics change to bio_track_wait() to deal with potential
compiler optimizations messing up the cmpxchg loop.
Reported-by: "goetz@net-amp.com" <goetz@net-amp.com>
| sys/kern/vfs_bio.c | diffblobblamehistory |