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From: Alfred Perlstein <alfred@FreeBSD.org>
Date: Fri, 15 Mar 2002 00:03:46 -0800 (PST)
To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: cvs commit: src/sys/kern kern_descrip.c kern_ktrace.c
         sys_generic.c sys_socket.c vfs_bio.c vfs_vnops.c
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alfred      2002/03/15 00:03:46 PST

  Modified files:
    sys/kern             kern_descrip.c kern_ktrace.c 
                         sys_generic.c sys_socket.c vfs_bio.c 
                         vfs_vnops.c 
  Log:
  Giant pushdown for read/write/pread/pwrite syscalls.
  
  kern/kern_descrip.c:
  Aquire Giant in fdrop_locked when file refcount hits zero, this removes
  the requirement for the caller to own Giant for the most part.
  
  kern/kern_ktrace.c:
  Aquire Giant in ktrgenio, simplifies locking in upper read/write syscalls.
  
  kern/vfs_bio.c:
  Aquire Giant in bwillwrite if needed.
  
  kern/sys_generic.c
  Giant pushdown, remove Giant for:
     read, pread, write and pwrite.
  readv and writev aren't done yet because of the possible malloc calls
  for iov to uio processing.
  
  kern/sys_socket.c
  Grab giant in the socket fo_read/write functions.
  
  kern/vfs_vnops.c
  Grab giant in the vnode fo_read/write functions.
  
  Revision  Changes    Path
  1.128     +2 -0      src/sys/kern/kern_descrip.c
  1.61      +3 -0      src/sys/kern/kern_ktrace.c
  1.94      +0 -8      src/sys/kern/sys_generic.c
  1.38      +12 -2     src/sys/kern/sys_socket.c
  1.303     +2 -0      src/sys/kern/vfs_bio.c
  1.139     +7 -1      src/sys/kern/vfs_vnops.c

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