From 0e847864cef404f555387d7fcc97f7dbe769e1e9 Mon Sep 17 00:00:00 2001 From: Richard Braun Date: Fri, 3 May 2013 19:56:50 +0200 Subject: Handle notification on page eviction If requested by the user, make libpager call pager_notify_evict when a page is flushed out by the kernel. Based on work by Ognyan Kulev. * console/pager.c (pager_notify_evict): New function. (user_pager_create): Update call to pager_create. * ext2fs/pager.c: (pager_notify_evict): New function. (create_disk_pager): Update call to diskfs_start_disk_pager. (diskfs_get_filemap): Update call to pager_create. * fatfs/pager.c: (pager_notify_evict): New function. (create_fat_pager): Update call to diskfs_start_disk_pager. (diskfs_get_filemap): Update call to pager_create. * isofs/pager.c: (pager_notify_evict): New function. (create_disk_pager): Update call to diskfs_start_disk_pager. (diskfs_get_filemap): Update call to pager_create. * libdiskfs/disk-pager.c (diskfs_start_disk_pager): Update definition and call to pager_create. * libdiskfs/diskfs-pager.h (diskfs_start_disk_pager): Update declaration. * libpager/data-request.c (_pager_seqnos_memory_object_data_request): Take pager's `notify_on_evict' member into account when calling memory_object_data_supply. * libpager/data-return.c (_pager_do_write_request): Handle user notification on page flush. * libpager/pager-create.c (pager_create): Update definition and set pager's `notify_on_evict' member. * libpager/pager.h (pager_create): Update declaration. (pager_notify_evict): New declaration. * libpager/priv.h (struct pager): New `notify_on_evict' member. * storeio/pager.c: (pager_notify_evict): New function. (dev_get_memory_object): Update call to pager_create. * tmpfs/pager-stubs.c (pager_notify_evict): New function. * ufs/pager.c (pager_notify_evict): New function. (create_disk_pager): Update call to diskfs_start_disk_pager. (diskfs_get_filemap): Update call to pager_create. --- fatfs/pager.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) (limited to 'fatfs') diff --git a/fatfs/pager.c b/fatfs/pager.c index f892c88f..8146e648 100644 --- a/fatfs/pager.c +++ b/fatfs/pager.c @@ -596,6 +596,13 @@ pager_unlock_page (struct user_pager_info *pager, return 0; } +void +pager_notify_evict (struct user_pager_info *pager, + vm_offset_t page) +{ + assert (!"unrequested notification on eviction"); +} + /* Grow the disk allocated to locked node NODE to be at least SIZE bytes, and set NODE->allocsize to the actual allocated size. (If the allocated size is already SIZE bytes, do nothing.) CRED @@ -752,7 +759,7 @@ create_fat_pager (void) struct user_pager_info *upi = malloc (sizeof (struct user_pager_info)); upi->type = FAT; pager_bucket = ports_create_bucket (); - diskfs_start_disk_pager (upi, pager_bucket, MAY_CACHE, + diskfs_start_disk_pager (upi, pager_bucket, MAY_CACHE, 0, bytes_per_sector * sectors_per_fat, &fat_image); } @@ -794,7 +801,7 @@ diskfs_get_filemap (struct node *node, vm_prot_t prot) diskfs_nref_light (node); node->dn->pager = pager_create (upi, pager_bucket, MAY_CACHE, - MEMORY_OBJECT_COPY_DELAY); + MEMORY_OBJECT_COPY_DELAY, 0); if (node->dn->pager == 0) { diskfs_nrele_light (node); -- cgit v1.2.3