- libpciaccess-fd-cache.patch: Cache sysfs PCI config space file
descriptors for great boot speed justice.
This commit is contained in:
Adam Jackson
parent
f949b3ae73
commit
38ab561713
143
libpciaccess-fd-cache.patch
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143
libpciaccess-fd-cache.patch
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@ -0,0 +1,143 @@
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diff -up libpciaccess-20071031/src/linux_sysfs.c.cache libpciaccess-20071031/src/linux_sysfs.c
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--- libpciaccess-20071031/src/linux_sysfs.c.cache 2007-10-23 09:19:36.000000000 -0400
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+++ libpciaccess-20071031/src/linux_sysfs.c 2008-01-22 19:23:12.000000000 -0500
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@@ -55,6 +55,8 @@
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#include "pciaccess_private.h"
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#include "linux_devmem.h"
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+static void pci_device_linux_sysfs_destroy( void );
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+
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static int pci_device_linux_sysfs_read_rom( struct pci_device * dev,
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void * buffer );
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@@ -74,7 +76,7 @@
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pciaddr_t * bytes_wrtten );
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static const struct pci_system_methods linux_sysfs_methods = {
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- .destroy = NULL,
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+ .destroy = pci_device_linux_sysfs_destroy,
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.destroy_device = NULL,
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.read_rom = pci_device_linux_sysfs_read_rom,
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.probe = pci_device_linux_sysfs_probe,
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@@ -362,6 +364,53 @@
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return err;
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}
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+static struct pci_device *last_config_dev = NULL;
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+static int config_fd = -1;
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+
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+static void
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+pci_device_linux_sysfs_destroy( void )
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+{
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+ if (config_fd != -1)
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+ close( config_fd );
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+}
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+
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+static int
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+open_config_fd( struct pci_device * dev, int flags )
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+{
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+ int fd;
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+ char name[256];
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+
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+ /* Each device has a directory under sysfs. Within that directory there
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+ * is a file named "config". This file used to access the PCI config
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+ * space. It is used here to obtain most of the information about the
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+ * device.
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+ */
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+
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+ if ( last_config_dev != dev ) {
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+ if ( config_fd != -1 ) {
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+ close( config_fd );
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+ last_config_dev = NULL;
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+ }
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+
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+ snprintf( name, 255, "%s/%04x:%02x:%02x.%1u/config",
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+ SYS_BUS_PCI,
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+ dev->domain,
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+ dev->bus,
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+ dev->dev,
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+ dev->func );
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+
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+ fd = open( name, flags );
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+ if ( fd == -1 ) {
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+ return -1;
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+ }
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+ config_fd = fd;
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+ last_config_dev = dev;
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+ } else {
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+ fd = config_fd;
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+ }
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+
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+ return fd;
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+}
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static int
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pci_device_linux_sysfs_read( struct pci_device * dev, void * data,
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@@ -378,23 +427,9 @@
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*bytes_read = 0;
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}
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- /* Each device has a directory under sysfs. Within that directory there
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- * is a file named "config". This file used to access the PCI config
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- * space. It is used here to obtain most of the information about the
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- * device.
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- */
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- snprintf( name, 255, "%s/%04x:%02x:%02x.%1u/config",
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- SYS_BUS_PCI,
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- dev->domain,
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- dev->bus,
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- dev->dev,
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- dev->func );
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-
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- fd = open( name, O_RDONLY );
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- if ( fd == -1 ) {
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+ fd = open_config_fd( dev, O_RDONLY );
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+ if ( fd == -1 )
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return errno;
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- }
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-
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while ( temp_size > 0 ) {
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const ssize_t bytes = pread64( fd, data_bytes, temp_size, offset );
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@@ -416,7 +451,6 @@
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*bytes_read = size - temp_size;
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}
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- close( fd );
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return err;
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}
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@@ -436,23 +470,9 @@
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*bytes_written = 0;
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}
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- /* Each device has a directory under sysfs. Within that directory there
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- * is a file named "config". This file used to access the PCI config
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- * space. It is used here to obtain most of the information about the
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- * device.
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- */
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- snprintf( name, 255, "%s/%04x:%02x:%02x.%1u/config",
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- SYS_BUS_PCI,
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- dev->domain,
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- dev->bus,
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- dev->dev,
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- dev->func );
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-
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- fd = open( name, O_WRONLY );
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- if ( fd == -1 ) {
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+ fd = open_config_fd( dev, O_WRONLY );
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+ if ( fd == -1 )
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return errno;
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- }
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-
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while ( temp_size > 0 ) {
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const ssize_t bytes = pwrite64( fd, data_bytes, temp_size, offset );
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@@ -474,7 +494,6 @@
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*bytes_written = size - temp_size;
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}
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- close( fd );
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return err;
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}
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@ -3,7 +3,7 @@
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Name: libpciaccess
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Version: 0.9.1
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Release: 2.%{gitdate}%{?dist}
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Release: 3.%{gitdate}%{?dist}
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Summary: PCI access library
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Group: System Environment/Libraries
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@ -17,6 +17,8 @@ Source0: libpciaccess-20071031.tar.bz2
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Source1: make-libpciaccess-snapshot.sh
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BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
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Patch0: libpciaccess-fd-cache.patch
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BuildRequires: autoconf automake libtool pkgconfig
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Requires: hwdata
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@ -35,6 +37,7 @@ Development package for libpciaccess.
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%prep
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%setup -q -n %{name}-%{gitdate}
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%patch0 -p1 -b .cache
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%build
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autoreconf -v --install
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@ -65,6 +68,10 @@ rm -rf $RPM_BUILD_ROOT
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%{_libdir}/pkgconfig/pciaccess.pc
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%changelog
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* Wed Jan 23 2008 Adam Jackson <ajax@redhat.com> 0.9.1-3.20071031
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- libpciaccess-fd-cache.patch: Cache sysfs PCI config space file
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descriptors for great boot speed justice.
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* Wed Oct 31 2007 Kristian Høgsberg <krh@redhat.com> 0.9.1-2.20071031
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- New snapshot, git revision e392082abb5696c8837224da86cc0af4f21d7010.
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- Pick up new .so file.
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