Imbus/xv6-riscv-kernel
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Introduce and use sleeplocks instead of BUSY flags

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Remove I_BUSY, B_BUSY, and intrans defs and usages
One spinlock per buf to avoid ugly loop in bget
fix race in filewrite (don't update f->off after releasing lock)
This commit is contained in:
Frans Kaashoek 2011-08-26 10:08:29 -04:00
parent 8a9b6dbd44
commit 3a5fa7ed90
12 changed files with 106 additions and 63 deletions
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6
file.h
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@ -15,7 +15,9 @@ struct inode {
uint dev; // Device number
uint inum; // Inode number
int ref; // Reference count
int flags; // I_BUSY, I_VALID
int flags; // I_VALID
struct spinlock lock;
struct sleeplock sleeplock;
short type; // copy of disk inode
short major;
@ -25,10 +27,8 @@ struct inode {
uint addrs[NDIRECT+1];
};
#define I_BUSY 0x1
#define I_VALID 0x2
// device implementations
struct devsw {