Understanding the Linux Kernel
By Daniel P. Bovet and Marco Cesati


Following are the changes made in the 9/01 reprint.


Here's a key to the markup:
        [page-number]: serious technical mistake
        {page-number}: minor technical mistake
        <page-number>: important language/formatting problem
        (page-number): language change or minor formatting problem
        ?page-number?: reader question or request for clarification


(1)  3rd paragraph:

"GNU Public License"

Has been changed to:

"GNU General Public License" 


{2} 7th paragraph:

"described in Bach's book (i.e., SVR4)."

Has been changed to:

"described in Bach's book (i.e., System V)."


{26} 7th paragraph: 

"the interrupt signal SIGTERM"

Has been changed to:

"the interrupt signal SIGINT"


(51) 4th paragraph: 

"N-way associative"

Has been changed to:

"N-way set associative"

also:

"a two-way set of associative cache"

Has been changed to:

"a two-way set associative cache"


(105) 3rd paragraph:

"any maskable interrupt issued by the PIC is simply ignored by the CPU."

Has been changed to:

"any maskable interrupt issued by the PIC is temporarily ignored by the
CPU."


(158) At the end of the second paragraph:

possfsible

Has been changed to:

possible


{163} 7th paragraph:

"Set if the kernel is allowed to discard the contents of page frames in
order to free memory before satisfying the request."

Is now followed by the sentence below:

"Up to version 2.2.14, the process may be blocked until free memory is
available."


{212} 1st bulleted item:

"The process already includes in its address space a memory region that
overlaps the linear address interval ranging from addr to addr+len; this
check is performed by the do_munmap() function, which returns the value
0 if the overlap exists."

Has been replaced:

"The process already includes in its address space a memory region
that overlaps the linear address interval ranging from addr to addr+len,
and moreover the do_munmap() function fails in releasing the overlapping
region." 


{254}  5th paragraph:

"are the standard ones listed in Table 9-1."

Is now followed by the sentence below:

Signal 1 is mapped to bit 0, signal 2 to bit 1, and so on."


{359} item number 3:

"Clears the LOOKUP_CONTINUE, LOOKUP_DIRECTORY, and LOOKUP_SLASHOK
flags in lookup_flags."

Has been replaced by:

"Clears the LOOKUP_FOLLOW flag in lookup_flags."


{360} fifth paragraph: 

"Reexecutes cached_lookup(),"

Has been replaced by: 

"Checks again whether the dentry object is in the cache,"


{371} last paragraph:

The whole sentence starting with:

"Additional access types..."

has been deleted.


{430} 2nd paragraph:

"Invokes sync_supers(), which takes care of superblocks used by
filesystems thatdo not store all the superblock data in a single disk
block (an example is Apple Macintosh's HFS). The function accesses"

Has been replaced with:

"Invokes sync_supers(), which accesses"

also: 

The following sentence has been deleted:

"The write_super method is not defined for any Unix filesystem."


(467) item number 2:

"if the descriptor exists but its SWP_WRITE flag is cleared while its
SWP_USED flag is set"

Has been replaced with:

"if the descriptor exists but the most significant bit of its
SWP_WRITEOK field is cleared while its SWP_USED flag is set"


{487} 2nd paragraph:

"and the memory region is shared"

Has been changed to:

"and the memory region is not shared"


r: Finished loading

(507) 3rd paragraph:

"block_group block group"

Has been changed to:

"i_block_group block group"


(515) 3rd paragraph:

"i_no"

Now reads:

"i_ino"


{518} 2nd paragraph:

"since dentry, buffer, and page caches"

Now reads:

"since inode, buffer, and page caches"