The patch titled sgi-gru: aSID (context management) bug fixes has been added to the -mm tree. Its filename is sgi-gru-asid-context-management-bug-fixes.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find out what to do about this The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ Subject: sgi-gru: aSID (context management) bug fixes From: Jack Steiner <steiner@xxxxxxx> This patch fixes bugs related to ASID (context id) management in the GRU driver. These changes are all internal to the SGI GRU driver and have no effect on the base kernel. Signed-off-by: Jack Steiner <steiner@xxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- drivers/misc/sgi-gru/grufile.c | 1 + drivers/misc/sgi-gru/grumain.c | 13 +++++++++---- 2 files changed, 10 insertions(+), 4 deletions(-) diff -puN drivers/misc/sgi-gru/grufile.c~sgi-gru-asid-context-management-bug-fixes drivers/misc/sgi-gru/grufile.c --- a/drivers/misc/sgi-gru/grufile.c~sgi-gru-asid-context-management-bug-fixes +++ a/drivers/misc/sgi-gru/grufile.c @@ -286,6 +286,7 @@ static void gru_init_chiplet(struct gru_ gru->gs_blade_id = bid; gru->gs_cbr_map = (GRU_CBR_AU == 64) ? ~0 : (1UL << GRU_CBR_AU) - 1; gru->gs_dsr_map = (1UL << GRU_DSR_AU) - 1; + gru->gs_asid_limit = MAX_ASID; gru_tgh_flush_init(gru); gru_dbg(grudev, "bid %d, nid %d, gid %d, vaddr %p (0x%lx)\n", bid, nid, gru->gs_gid, gru->gs_gru_base_vaddr, diff -puN drivers/misc/sgi-gru/grumain.c~sgi-gru-asid-context-management-bug-fixes drivers/misc/sgi-gru/grumain.c --- a/drivers/misc/sgi-gru/grumain.c~sgi-gru-asid-context-management-bug-fixes +++ a/drivers/misc/sgi-gru/grumain.c @@ -79,7 +79,6 @@ static int gru_wrap_asid(struct gru_stat gru_dbg(grudev, "gid %d\n", gru->gs_gid); STAT(asid_wrap); gru->gs_asid_gen++; - gru_flush_all_tlb(gru); return MIN_ASID; } @@ -93,6 +92,7 @@ static int gru_reset_asid_limit(struct g limit = MAX_ASID; if (asid >= limit) asid = gru_wrap_asid(gru); + gru_flush_all_tlb(gru); gid = gru->gs_gid; again: for (i = 0; i < GRU_NUM_CCH; i++) { @@ -131,12 +131,10 @@ static int gru_assign_asid(struct gru_st { int asid; - spin_lock(&gru->gs_asid_lock); gru->gs_asid += ASID_INC; asid = gru->gs_asid; if (asid >= gru->gs_asid_limit) asid = gru_reset_asid_limit(gru, asid); - spin_unlock(&gru->gs_asid_lock); gru_dbg(grudev, "gid %d, asid 0x%x\n", gru->gs_gid, asid); return asid; @@ -227,7 +225,9 @@ static int gru_load_mm_tracker(struct gr spin_lock(&gms->ms_asid_lock); asid = asids->mt_asid; - if (asid == 0 || asids->mt_asid_gen != gru->gs_asid_gen) { + spin_lock(&gru->gs_asid_lock); + if (asid == 0 || (asids->mt_ctxbitmap == 0 && asids->mt_asid_gen != + gru->gs_asid_gen)) { asid = gru_assign_asid(gru); asids->mt_asid = asid; asids->mt_asid_gen = gru->gs_asid_gen; @@ -235,6 +235,7 @@ static int gru_load_mm_tracker(struct gr } else { STAT(asid_reuse); } + spin_unlock(&gru->gs_asid_lock); BUG_ON(asids->mt_ctxbitmap & ctxbitmap); asids->mt_ctxbitmap |= ctxbitmap; @@ -259,10 +260,12 @@ static void gru_unload_mm_tracker(struct asids = &gms->ms_asids[gru->gs_gid]; ctxbitmap = (1 << gts->ts_ctxnum); spin_lock(&gms->ms_asid_lock); + spin_lock(&gru->gs_asid_lock); BUG_ON((asids->mt_ctxbitmap & ctxbitmap) != ctxbitmap); asids->mt_ctxbitmap ^= ctxbitmap; gru_dbg(grudev, "gid %d, gts %p, gms %p, ctxnum 0x%d, asidmap 0x%lx\n", gru->gs_gid, gts, gms, gts->ts_ctxnum, gms->ms_asidmap[0]); + spin_unlock(&gru->gs_asid_lock); spin_unlock(&gms->ms_asid_lock); } @@ -412,6 +415,7 @@ static void gru_free_gru_context(struct __clear_bit(gts->ts_ctxnum, &gru->gs_context_map); gts->ts_ctxnum = NULLCTX; gts->ts_gru = NULL; + gts->ts_blade = -1; spin_unlock(&gru->gs_lock); gts_drop(gts); @@ -731,6 +735,7 @@ again: } reserve_gru_resources(gru, gts); gts->ts_gru = gru; + gts->ts_blade = gru->gs_blade_id; gts->ts_ctxnum = find_first_zero_bit(&gru->gs_context_map, GRU_NUM_CCH); BUG_ON(gts->ts_ctxnum == GRU_NUM_CCH); _ Patches currently in -mm which might be from steiner@xxxxxxx are sgi-gru-add-definitions-of-x86_64-gru-mmrs.patch sgi-gru-add-definitions-of-ia64-gru-mmrs.patch sgi-gru-add-macros-for-using-the-uv-hub-to-send-interrupts.patch sgi-gru-misc-gru-cleanup.patch sgi-gru-improvements-to-gru-debug-messages-statistics.patch sgi-gru-change-gru-cch-commands-from-inline-functions-to-outofline-functions.patch sgi-gru-add-statistics-to-the-gru-context-management-functions.patch sgi-gru-add-support-for-a-user-to-explicitly-unload-a-gru-context.patch sgi-gru-asid-context-management-bug-fixes.patch sgi-gru-restructure-the-gru-vtop-functions.patch sgi-gru-add-support-to-the-gru-driver-for-message-queue-interrupts.patch sgi-gru-macro-for-scanning-all-gru-chiplets.patch sgi-gru-fix-bugs-related-to-module-unload-of-the-gru-driver.patch sgi-gru-support-multiple-pagesizes-in-gru.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html