Hi,
this patch fixes an SMP deadlock that triggered in some production
usage:
--- xxx/mm/shmem.c.~1~ 2003-06-01 19:14:07.000000000 +0200
+++ xxx/mm/shmem.c 2003-06-04 02:17:23.000000000 +0200
@@ -808,9 +808,9 @@ void shmem_lock(struct file * file, int
struct inode * inode = file->f_dentry->d_inode;
struct shmem_inode_info * info = SHMEM_I(inode);
- down(&info->sem);
+ spin_lock(&info->lock);
info->locked = lock;
- up(&info->sem);
+ spin_unlock(&info->lock);
}
int shmem_make_bigpage_mmap(struct file * file, struct vm_area_struct * vma)
you can merge it in 21-final IMHO (even dropping the lock enterely would
been ok, the reader is out of order anyways and that's atomic stuff in C
no matter the architecture)
Andrea
-
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This archive was generated by hypermail 2b29 : Sat Jun 07 2003 - 22:00:23 EST